1.) the attraction between two _____ forms an ionic bond.
A) atoms of the same change
B) cations
C) atoms of the opposite charge
D) metals
2.) what is an ion with a positive charge called?
A) anion
B) cation
C) valence electron
D) covalent ion
Answers
1. Ionic form is formed when one or more electrons from the valence shell of an atom (electropositive metal ) are completely transferred to the valence shell of another atom (electronegative non-metal). Ionic bonding is the complete transfer of valence electron(s) between oppositely charged atoms.
For example NaCl (sodium chloride ) is an ionic bond, in which valence electron from Na gets completely transferred to the valence shell of Cl and ionic bond is formed between opposite ions that is Na (positive) and Cl (negative).
[tex] Na^{+}(cation) + Cl^{-}(anion)\rightarrow Ionic bond [/tex]
So option 'C' is correct choice.
2. A neutral atom can lose or gain an electron.
If the neutral atom loses an electron it will become ion with positive charge known as 'Cation'
If the neutral atom gains an electron it will become ion with negative charge known as 'Anion'
So an ion which positive charge is called 'Cation' , option B is correct.
An attraction between two atoms of the opposite charge forms an ionic bond. An ion with a positive charge is known as a cation.
Explanation:The attraction between two atoms of the opposite charge forms an ionic bond. The negatively charged atom (anion) and positively charged atom (cation) experience a strong electrostatic attraction that constitutes an ionic bond. This typically occurs between a metal and nonmetal atom.
An ion with a positive charge is called a cation. Cations are usually metals. For example, when neutral sodium loses one electron, it becomes a positively charged sodium cation (Na+).
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Related Questions
1. A 10 g gold coin is heated from 25°C to 50°C (CAu is 0.13 J/g-°C). What is the H?
(Points : 1)
+32.5 J
25 J
+25 J
- 32.5 J
I know it is 32.5 J but is it negative or positive... I say it is negative, but I could be wrong...,
Answers
H = m C Δt where:
m = 10 g
C = 0.13 J/g.°C
Δ t = final temperature - initial temperature = 50 - 25 = + 25 °C
so H = 10 x 0.13 x (+25) = + 32.5 J
Answer:
+32.5 J
Explanation:
An increase in temperature can disturb the liquid-vapor equilibrium
True
False
Answers
when the temperature changes, it affects the equilibrium constant and that makes the equilibrium change.
because when the temperature changes that make the vapor pressure changes and make the equilibrium shifts.
MnO2+ 4HCL--->MnCl2+Cl2+2H2O:
if 0.86 mole of MnO2 and 48.2g of HCL react, which reagent will be used up first? How many grams of Cl2 will be produced?
The answers are HCL, and 23.4g.
How would I get these answers?,
Answers
Mole of MnO2 is 0.86
mass of HCl is 48.2 g
Molarity of HCl is 36.5 g/mole,
Molarity of Cl2 is 71 g/mole
mole of HCl = mass of HCl/Molarity of HCl = 48.2/36.5 = 1.32 mole
From the above chemical equation: 4 moles of HCl reacts with 1 mole of
MnO2 . Thus,
0.86 mole of MnO2 require 4·0.86 = 3.44 moles of HCl to react.
but only 1.32 mole are present (as calculated earlier).
This implies HCl is in lesser amount compared with MnO2 and
Hence, HCl will be used up first.
Now, From the above given chemical equation:
1 mole of Cl2 is produced when 4 moles of HCl react. So,
4 mole * 36.5 g/mole HCl –---> 1 mole * ·71g/mole Cl2
48.2 g HCl –----> mass of Cl2
mass of Cl2 = 71 * 48.2 / (4 *36.5) = 23.4 g
Which of the following statements is true? Oceanic crust is thicker than continental crust. Both oceanic and continental crust is made of granite. According to continental drift, the continents were once connected. The crust is thickest layer of the Earth.
Answers
Answer: According to continental drift, the continents were once connected
Explanation:
According to continental drift, the continents were once connected this statement is true.
What is true about continental drift ?Pangaea split into fragments over the course of millions of years, and each piece migrated away from the other. These components gradually came together to form the continent that is known today.
Today's scientists believe that a number of supercontinents, including Pangaea, have developed and fragmented during the Earth's history.
The theory of continental drift holds that Earth's continents have shifted relative to one another during geologic time, giving the impression that they have "drifted" over the ocean floor.
During one or more geologic periods, continents moved horizontally at a huge scale in relation to one another and to the ocean basins. This idea served as a crucial building block for the theory of plate tectonics, which includes it.
Thus, option C is correct.
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Why is a spectrum for a given element unique for that element?
A. No element has more than two electrons in the first shell.
B. Each element has a unique arrangement of electrons.
C. Atoms of different elements have different masses.
D. Atomic nuclei contain no electrons.
Answers
Explanation:
1) Since the number of electrons in neutral atoms is equal to the number of protons, and the number of protons are unique for each element, each element has a unique arrangement of electrons.
2) The spectrum of an element is the radiation emitted for the atoms of the element when the valence electrons are emitted and that depended on the electrons configuration.
Answer:
B
Explanation:
Which material needs extra energy to enable the movement of free electrons? A. Conductor B. Semiconductor C. Insulator D. Element
Answers
Use ksp=4.87×10−17 to calculate the solubility of iron (ii) hydroxide in pure water in grams per 100.0 ml of solution. g
Answers
Therefore; 4.87 ×10^-17 = [Fe2+][OH-]^2 = (X)(2X)^2 = 4X^3
Hence;
4x^3 =4.87 × 10^-17
x = 2.30 × 10^-6 M
therefore the molarity is 2.3 ×10^-6 M
Thus;
The mass of Fe(OH)2 in 100 ml of water, will be given by:
= 2.30 × 10^-6 mol/L = 2.3 ×× 10^-5 mole/100 mL
= 89.86 g/mol × 2.3 × 10^-6 × 0.100 = 2.07 × 10^-5 g
= 2.07 × 10^-5 g
= 2.07 × 10^-5 g
The solubility product constant is the equilibrium constant of a substance in an aqueous solution. The solubility of iron (ii) hydroxide is [tex]2.07 \times 10^{-5}\;\rm g.[/tex]
What is Ksp?Ksp is the solubility product constant, which is given as the product of the concentration of cation and anion dissociated in the aqueous solution.
Given,
Ksp = [tex]4.87 \times 10^{-17}[/tex]
Thus,
[tex]\begin{aligned}&= \rm [Fe^{2+}][OH^{-}]^{2} \\\\&= \rm (X)(2X)^{2} \\\\&= \rm 4X^{3}\end{aligned}[/tex]
The molarity can be calculated as:
[tex]\begin{aligned}\rm 4X^{3} =4.87 \times 10^{-17}\\\\\rm X= 2.30 \times 10^{-6}\;\rm M\end{aligned}[/tex]
The mass of iron (ii) hydroxide in 100 mL of water is calculated as:
[tex]\begin{aligned}2.30 \times 10^{-6} \;\rm mol/L &= 2.3 \times 10^{-5}\;\rm mole/100 mL\\\\&= 2.07 \times 10^{-5} \;\rm g\end{aligned}[/tex]
Therefore, the solubility of iron (ii) hydroxide is [tex]2.07 \times 10^{-5}\;\rm g.[/tex]
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How do most vertebrates reproduce—sexually or asexually? What are gametes? How is an embryo produced?
I NEED THE ANSWER QUICK
Answers
2) A mature haploid male germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
3) In a placental mammal, an ovum Is fertilized in a fallopian tube through which it travels into the uterus.
How much heat is absorbed by 15.5 g of water when its temperature is increased from 20.0°C to 50.0°C? The specific heat of water is 4.184 J/(g°C).,
Answers
q : Heat absorbed
m : mass of the sample
C : The specific heat of the substance.
Δ T : The change in temperature (Final T - initial T)
So:
q = 15.5 x 4.18 x (50 - 25) = 1619.75 J
Answer : The heat absorbed by the water is 19.4 kJ
Explanation :
Formula used :
[tex]Q=m\times c\times \Delta T[/tex]
or,
[tex]Q=m\times c\times (T_2-T_1)[/tex]
where,
Q = heat absorbed = ?
m = mass of water = 15.5 g
c = specific heat of water = [tex]4.184J/g^oC[/tex]
[tex]T_1[/tex] = initial temperature = [tex]20.0^oC[/tex]
[tex]T_2[/tex] = final temperature = [tex]50.0^oC[/tex]
Now put all the given value in the above formula, we get:
[tex]Q=15.5g\times 4.184J/g^oC\times (50.0-20.0)^oC[/tex]
[tex]Q=1945.56J=1.94\times 10^3J=1.94kJ[/tex]
Therefore, the heat absorbed by the water is 19.4 kJ
Which particles in an atom could demonstrate that opposite charges attract?
A.
a neutron and an electron
B.
two protons together
C.
a proton and a neutron
D.
a proton and an electron
Answers
protons are positively charged
and electrons have negative charge.
protons in the nucleus attract electrons around the nucleus
what is the urinary system and what does it do
Answers
What was the total demand by all counties for water from the Sweetbriar River Basin in 1970? What is it projected to be in 2020?
Answers
Hope this helpsssssssssssss!!!
How many liters of fluorine gas, at 298 K and 0.98 atm, will react with 23.5 grams of potassium metal? Show all of the work used to solve this problem. 2K + F2 2KF
Answers
consider K atomic wt. = 39
23.5 g of K = 0.603 moles, hence following the molar ratio of the balanced equation, 0.603 moles of potassium will use 0.3015 moles of F2. (number of moles, n = 0.3015)
Now, following the ideal gas equation, PV = nRT
P = 0.98 atm
V = unknown
n = 0.3015 moles
R = 82.057 cm^3 atm K^-1mole^-1 (unit of R chosen to match the units of other parameters; see the reference below)
T = 298 K
Solving for V,
V = (nRT)/P = (0.3015 mol * 82.057 cm^3 atm K^-1 mol^-1 * 298 K)/(0.98 atm)
solve it to get 7517.6 cm^3 as the volume of F2 = 7.5176 liters of F2 gas is needed.
When the concentration of solute in a solid solution exceeds its solubility limit, a new solid solution or phase forms that has a composition distinctly different than the original solid solution?
Answers
Solid solution is a solid state solution of one or more solutes in a solvent or mixture of two crystalline solids that coexist as crystal lattice. Examples of solid solutions are metal alloys (mixture of metals or a mixture of a metal and another element), semiconductors and moist solids.
When solute concentration exceeds the solubility limit in a solution, a supersaturated solution is created, which subsequently initiates precipitation in order to achieve equilibrium. This results in the formation of a new solid phase that is distinct from the original solution.
Explanation:The concept you're referring to involves solubility and the formation of new phases when the concentration of a solute in a solution exceeds its solubility limit. Solubility refers to the maximum amount of solute that can be dissolved in a solvent at a given temperature. When this limit is surpassed, a supersaturated solution is formed. This is not a stable state, and it often results in precipitation. This is the process where a solute becomes insoluble and forms a new, separate solid phase.
For instance, if we take a saturated solution of silver chloride (AgCl), and add more AgCl to it, the excess will precipitate out of solution. Here, the concentration of AgCl has exceeded its solubility, leading to the formation of a new solid phase that is distinct from the original solution.
The exact composition and form of the new solid phase can depend on a variety of factors, including the type of solvent and solute involved, temperature, and pressure.
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Write the dissociation reaction and the corresponding ka equilibrium expression for hcn in water
Answers
Ka = [CN⁻] · [H₃O⁺] / [HCN].
[HCN] is equilibrium concentration of hydrocyanic acid.
hydrocyanic acid is weakly acidic and partially ionizes in water solution and give the cyanide anion (CN⁻).
The salts of the cyanide anion are called cyanides.
The dissociation reaction of HCN in water is HCN(aq) ↔ H⁺(aq) + CN⁻(aq).
Here is the balanced dissociation reaction for hydrocyanic acid (HCN) in water:
HCN(aq) ↔ H⁺(aq) + CN⁻(aq)
The equilibrium expression for the acid dissociation constant (Ka) for this reaction is given by:
Ka = [H⁺][CN⁻] / [HCN]
This expression shows that the equilibrium constant (Ka) for HCN dissociation is determined by the concentrations of the hydrogen ions (H⁺), the cyanide ions (CN⁻), and the undissociated hydrocyanic acid (HCN) in the solution.
If the molecular mass of tetraoxosulphate(VI) acid is 98, calculate it's vapour density.
Answers
So Vapor density = molar mass of gas/molar gas of hydrogen
when we have the molar mass of the tetraoxosulphate (VI) = 98 & and we have the molar mass of Hydrogen = 2 so by substitution.
∴ Vapor density = 98 / 2 = 49
Consider the balanced equation below.
What is the mole ratio of Fe3O4 to Fe?
1:3
1:4
3:1
4:3
Answers
The mol ratio is the number in front of one chemical to the other.
There is a 3 in front of the Fe.
There is a 1 in front of the Fe3O4
Edit
What the original answer gave was the mole ratio of Fe to Fe3O4. It is actually the other way around. The answer should be 1:3 because it was asked as Fe3O4 to Fe.
The correct answer is A <<<<<<<< Correct Answer.
Answer:
1:3
Explanation:
Hope this helps :)
What is the mass, in grams, of 7.20×1020 molecules of caffeine, c8h10n4o2?
Answers
To convert the number of molecules into moles, you need to divide it with 6.02 * 10^23. The calculation of the mass of c8h10n4o2 would be:
(7.20×10^20 molecules) /(6.02 * 10^23 molecule/mol) * 194g/mol= 232 * 10^-3 grams= 0.232 grams
Answer: 0.23 grams
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text{Avogadro's number}}=\frac{7.20\times 10^{20}}{6.023\times 10^{23}}=1.2\times 10^{-3}moles[/tex]
1 mole of caffeine [tex](C_8H_{10}N_4O_2)[/tex] weighs = 194 g
[tex]1.2\times 10^{-3}[/tex] moles of [tex](C_8H_{10}N_4O_2)[/tex] weigh = [tex]\frac{194}{1}\times 1.2\times 10^{-3}=0.23g[/tex]
Thus mass of caffeine [tex](C_8H_{10}N_4O_2)[/tex] is 0.23 grams.
Which of these is an example of a physical change?
sugar, when heated, producing carbon dioxide and water
solid ice, when heated, turning into liquid water
sodium, when exposed to chlorine, forming sodium chloride
aluminum, when heated in air, forming aluminum oxide
Answers
Answer: Option (b) is the correct answer.
Explanation:
When there is no change in chemical composition of a substance then this change is known as physical change.
Where as when there is change in chemical composition of a substance then it is known as chemical change.
When sugar is heated, it results in the formation of carbon dioxide and water. This means that composition of sugar has changed thus, it is a chemical change.
When solid ice is melted, it turns into liquid. This shows that only state of water has changed. There is no change in chemical composition because when we freeze water then again liquid water changes into solid ice. Thus, it is a physical change.
When sodium reacts with chlorine then the reaction is as follows.
[tex]2Na + Cl_{2} \rightarrow 2NaCl[/tex]
It shows that chemical composition of sodium has changed due to the formation of sodium chloride. Thus, it is a chemical change.
Also, when aluminium is is heated in air then it results in the formation of aluminium oxide. This means that the chemical composition of aluminium has changed.
Hence, we can conclude that out of the given options, solid ice, when heated, turning into liquid water is an example of a physical change.
A substance is 35.7% carbon by mass. how much carbon could be recovered from 769 g of the substance?
Answers
The amount of carbon that could be recovered from 769g of a substance that is 35.7% carbon by mass is approximately 275g.
Explanation:The question involves a percentage by mass calculation, which falls under the subject of Chemistry. The substance in question is 35.7% carbon by mass. Therefore, to find the amount of carbon in a 769g sample, we multiply the total mass of the substance by the percentage of carbon.
Here's the calculation: 769g (total mass) x 0.357 (percentage of carbon as a decimal) = 274.653g. Therefore, we can recover approximately 275g (if we round to the nearest whole number) of carbon from the 769 g of the substance.
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To find how much carbon is in 769 g of a substance that is 35.7% carbon by mass, multiply 769 g by 0.357. This calculation shows that 274.833 g of carbon can be recovered.
To determine this, we can use the percentage by mass to find the amount of carbon in the total mass of the substance. Here's the step-by-step calculation:
First, convert the percentage into a decimal: 35.7% = 0.357
Amount of carbon = mass of the substance × percentage of carbon (in decimal form)
Amount of carbon = 769g × 0.357
Amount of carbon = 274.553g
Therefore, you could recover approximately 274.553 grams of carbon from 769 grams of the substance.
Sheena wants to list the outer planets from smallest to largest. Which is correct? Jupiter, Saturn, Uranus, Neptune Neptune, Jupiter, Uranus, Saturn Neptune, Uranus, Saturn, Jupiter Saturn, Uranus, Neptune, Jupiter
Answers
Saturn
Uranus
Neptune
What type of stress is caused by two plates sliding past one another?
Answers
Writing net ionic equation:
A solution of diamminesilver(I) chloride is treated with dilute nitric acid.
So what I did was..
[Ag(NH3)2]Cl(aq) + HNO3(aq) -> __________
The answer is
[Ag(NH3)2]+ + Cl- + 2H+ -> AgCl + 2NH4+
I would guess that the oxidation #s for diamminesilver(I) chloride would be:
Ag +1
NH3 0
Cl -1
Can someone please show me the steps in between?
I don't really know how to break the [Ag(NH3)2]Cl apart and predict/form the products.
Answers
[Ag(NH₃)₂]⁺ + Cl⁻ + 2H⁺ → AgCl + 2 NH₄⁺
As i can see that you balanced it correctly also you calculated the charge of each part correctly but you need to know more details about complexes:
complex is formed between Metal cations as Ag⁺, Cu⁺², Fe⁺³ and ligands which may be neutral as NH₃ or H₂O or negatively charged as CN⁻ or halide
The number of ligands attached to metal is the co-ordination number, in our case Ag has coordination number = 2 so it must attached to two ligands which are NH₃ here (neutral ligands)
- The charge of complex is the sum of metal and ligand charges +1 for Ag and 0 for NH₃ so the overall charge of complex is +1
so the complex must be attracted to negatively charged anion which is Cl⁻ here and both react with H⁺ from acid (HNO₃) to give AgCl precipitate and NH₄⁺ ion.
In this net ionic equation, we can see that the silver ion ([Ag(NH3)2]+) reacts with the chloride ion (Cl-) to form silver chloride (AgCl). Additionally, the two hydrogen ions (2H+) react with the two ammonia molecules (2NH3) to form two ammonium ions (2NH4+).
To write the net ionic equation for the reaction between diamminesilver(I) chloride and dilute nitric acid, let's break down the steps:
1. Start with the balanced molecular equation: [Ag(NH3)2]Cl(aq) + HNO3(aq) ->
2. Identify the ions present in the reactants and determine if any of them are spectator ions. In this case, we have [Ag(NH3)2]Cl and HNO3.
The [Ag(NH3)2]Cl dissociates into two ions: [Ag(NH3)2]+ and Cl-. However, HNO3 is a strong acid and fully dissociates into H+ and NO3- ions.
Therefore, the spectator ions in this reaction are Cl- and NO3-.
3. Write the net ionic equation by removing the spectator ions:
[Ag(NH3)2]+ + 2H+ -> AgCl + 2NH4+
In this net ionic equation, we can see that the silver ion ([Ag(NH3)2]+) reacts with the chloride ion (Cl-) to form silver chloride (AgCl). Additionally, the two hydrogen ions (2H+) react with the two ammonia molecules (2NH3) to form two ammonium ions (2NH4+).
To determine the oxidation numbers, you are correct in assigning +1 to silver (Ag) and -1 to chloride (Cl). However, the oxidation number of ammonia (NH3) is 0 because hydrogen (H) has an oxidation number of +1 and there are no other elements to balance out the charge.
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PLEASE!! *MEASURING MATTER VOCAB MATCHING*
words:
1. matter
2. accuracy
3. precision
4. meniscus
5. volume
6. density
definitions:
- the mass of an object per unit volume
- anything that has mass and occupies space
- space occupied, measured in cubic units
- the degree to which a measurement can be replicated
- the curved top surface of a liquid column
- an indication of how close a measurement is to the correct result
MATCH THE WORDS TO THE DEFINITIONS PLEASE & THANK YOU!!
Answers
accuracy - an indication of how close a measurement is to the correct result
precision - the degree to which a measurement can be replicated
meniscus - the curved top surface of a liquid column
volume - spaced occupied measured in cubic units
density - mass of an object per unit volume
The words 'matter', 'accuracy', 'precision', 'meniscus', 'volume', and 'density' have been linked with their suitable definitions, clarifying their individual meanings.
Explanation:Here are the words matched to their definitions:
Matter: Anything that has mass and occupies space.Accuracy: An indication of how close a measurement is to the correct result.Precision: The degree to which a measurement can be replicated.Meniscus: The curved top surface of a liquid column.Volume: Space occupied, measured in cubic units.Density: The mass of an object per unit volume.Learn more about Vocabulary Matching here:https://brainly.com/question/29261631
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EASY AND IMPORTANT What do you think is the most challenging aspect of using a microscope? What are the advantages and disadvantages of using a microscope to look at trace evidence?
Answers
The most challenging aspect is focusing the microscope.
Microscopes enables us to view objects that cannot be seen with the human eye alone.
A disadvantage is that not all types of evidence can be clearly seen.
What is a microscope?A microscope is an instrument that is used to view tiny and microscopic objects.
In using a microscope, the most challenging aspect is focusing the microscope.
An advantage of microscopes is that they enable us to view objects that cannot be seen with the human eye alone.
A disadvantage though is that not all evidence can be clearly seen.
In conclusion, a microscope helps one to view trace and tiny objects.
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Describe how to make 1.50 liters of a 0.01 M ammonium chloride solution
Answers
To know how many grams of Ammonium Chloride ( a solid) you'll need to make 1.50 L of a 0,01 M solution you'll need to use the definition of molar concentration (M=mol/L) in the following way:
[tex]1,50 L* \frac{0,01 mol NH_4Cl}{1L}* \frac{53,489gNH_4Cl}{1 mol NH_4Cl}=0,8023 g NH_4Cl [/tex]
So, you'll need to dissolve 0,8023 g of Ammonium Chloride in 1,5 L of water to make this solution.
Have a nice day!
What is the [H+] of a solution with a pH of 6.6? Use a scientific calculator.
2.5 × 107
5.0 × 105
8.3 × 106
7.7 × 105
Answers
pH = -log([H+])
Please note the negative sign in front of the log function. As concentration of H+ ions increases, the pH will decrease. If pH = 6.6, then:
pH = 6.6 = -log([H+])
You can multiple both sides by -1. Then, to get rid of the log function, set both sides of the equation equal to 10^ as shown below:
10^(-6.6) = [H+]
10^(-6.6) = 2.511x10^-7,
Considering the definition of pH, the concentration [H⁺] is 2.5 ×10⁻⁷ M.
Definition of pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
Concentration [H⁺] of the solutionIn this case, being pH= 6.6, you can replace this value in the definition of pH:
6.6 = -log [H⁺]
Solving:
[H⁺]= 10⁻⁶ ⁶ M
[H⁺]= 2.5 ×10⁻⁷ M
Finally, the concentration [H⁺] is 2.5 ×10⁻⁷ M.
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Please help!!!!! Why is a spectrum for a given element unique for that element? A. No element has more than two electrons in the first shell. B. Each element has a unique arrangement of electrons. C. Atoms of different elements have different masses. D. Atomic nuclei contain no electrons.
Answers
Each element has a unique arrangement of electrons, so each element has different spectrum. Therefore, the correct option is option B.
What is element?The quantity of protons an element has defines it. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary. Ions are produced by altering the electron to proton ratio, whereas isotopes are produced by altering the neutron count.
A material that cannot be destroyed chemically is referred to as a chemical element. Although chemical processes cannot modify an atom, nuclear reactions can create new elements. Each element has a unique arrangement of electrons, so each element has different spectrum.
Therefore, the correct option is option B.
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Will a precipitate form when 65.0 mL of 0.0200 M Ag2SO4 is mixed with 50.0 mL of 0.00500 M K2CO3? (Ksp for silver carbonate is 8.00 x 10–12).
Answers
when Ksp = [Ag+]^2[CO3-]
when 2 mol of Ag+ gives 1 mol Ag2SO4
and no.of moles of Ag2SO4 = volume * molarity
= 65 ml/1000 * 0.02M = 0.0013 moles
∴ no.of moles of Ag+ = 2 x 0.0013 = 0.0026 moles
and when 1 mol of CO3- gives 1 mol K2CO3
and no.of moles of K2CO3 = volume * molarity
= 50 ml/1000 * 0.005 M = 0.00025 moles
∴no of moles of CO3- = 0.00025 * 1 = 0.00025 moles
∴Ksp = (0.0026)^2 * (0.00025)
= 1.69x10^-9
by comparing this value with the given value
∴ Ag2CO3 would be precipitated.
Yes, the precipitate of silver carbonate will form.
To determine if a precipitate will form when 65.0 mL of 0.0200 M Ag2SO4 is mixed with 50.0 mL of 0.00500 M K2CO3, we need to compare the ion product (Qsp) with the solubility product constant (Ksp) for silver carbonate (Ag2CO3).
First, let's calculate the concentrations of ions after mixing the solutions:
For Ag2SO4:
- Initial moles of Ag2SO4 = 0.0200 M * 0.0650 L = 0.00130 moles
- Moles of Ag+ ions = 2 * 0.00130 moles = 0.00260 moles
- Concentration of Ag+ ions = 0.00260 moles / (0.0650 L + 0.0500 L) = 0.0200 M
For K2CO3:
- Initial moles of K2CO3 = 0.00500 M * 0.0500 L = 0.000250 moles
- Moles of CO3^2- ions = 0.000250 moles
- Concentration of CO3^2- ions = 0.000250 moles / (0.0650 L + 0.0500 L) = 0.00192 M
Now, to find out if a precipitate will form, we calculate the ion product, Qsp, for silver carbonate:
Qsp = [tex][Ag+]^2 * [CO3^2-][/tex]
Qsp = [tex](0.0200)^2 * (0.00192)[/tex]
Qsp = 7.68 x 10^-6
Compare Qsp with the Ksp of silver carbonate (Ag2CO3):
Ksp = 8.00 x 10^-12
Since Qsp (7.68 x 10^-6) is greater than Ksp (8.00 x 10^-12), the ion product exceeds the solubility product constant. According to the principles of solubility and precipitation, when Qsp > Ksp, a precipitate of silver carbonate (Ag2CO3) will form.
The precipitate of silver carbonate (Ag2CO3) will form when 65.0 mL of 0.0200 M Ag2SO4 is mixed with 50.0 mL of 0.00500 M K2CO3.
Which changes are evidence of a chemical reaction? a beaker of water becomes hot to the touch upon?