Chemistry Chapter 16

Question 1

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What is ksp?

Answer 1

It’s the solubility product constant,

Question 2

When does dynamic equilibrium occur?

Answer 2

Dynamic equilibrium occurs when the reaction becomes reversible.

Question 3

What happens to a salt when it reaches dynamic equlibrium?

Answer 3

No more salt turns into ions, and vice versa (and the solution is said to be saturated).

Question 4

What

Question 5

Does the amount of solid salt change the equilibrium constant?

Answer 5

No

Question 6

What DON’T you mention in the ksp equation? (law of mass action)

Answer 6

Solid salts

Question 7

Why doesn’t the amount of solid salts change the position of the equilibrium constant?

Answer 7

When the ions in solution re-form the solid, they do so on the surface of the solid. Thus doubling the surface area of the solid not only doubles the rate of dissolving, but also doubles the rate of re-formation of the solid. The amount of excess solid present therefore has no effect on the equilibrium position.
1/1 = 1
2/2 = 1
Same thing mamasita
Similarly, if you gring up the salt, it’ll make it dissolve faster, but it won’t change the equilibrium position.

Question 8

What is the solubility product?

Answer 8

It’s the equilbirum constant of a salt (that only has one value) at a given temperature

Question 9

What is solubility?

Answer 9

It’s the equilibrium position

Question 10

What is an equilibrium position?

Answer 10

A particular set of concentrations of reactant and product species during equilibrium.

Question 11

What;s the only thing that can change an equilibrium constant?

Answer 11

Temperature

Question 12

How do you calculate the ksp from the solubility of the solid salt?

Answer 12

You assume that the solubility is the equilibrium concentrations (but multiply the coefficients accordingly first) and then calculate the ksp from there by multiplying the concentrations.

Question 13

How do you find solubility from ksp?

Answer 13

Assume that x is the solubility and find x using the ksp.

Question 14

A larger Ksp value (when the ions that the salt dissolves into are the same) means…

Answer 14

The salt is more soluble, and vice versa

Question 15

Can we always check relative solubility using Ksp?

Answer 15

No, because the ions that a salt produces also plays a role in determining the solubility.

It’s better to calculate it normally in this case

Question 16

If X- is an effective base, aka an weak acid, what will happen to the solubility of the salt?

Answer 16

It will increase

Also vice versa

Question 17

What’s the ion product?

Answer 17

It’s the same thing as Ksp but with initial concenctrations

Question 18

If Q>k…

Answer 18

Precipitate occurs

Question 19

I

If Q<k

Answer 19

No preciptate occurs

Question 20

How do you perform selective precipitation?

Answer 20

It’s performed by using a reegant that seperates ions only form with one or a few metal io ns in the mixture.