17.3

Question 1

Insoluble salts are…

Answer 1

are not completely insoluble. They are sparingly soluble.​

Question 2

What is the expression for the dissolving of solid PbCl₂ in water?​

Answer 2

When an equilibrium equation is written, the solid is the reactant and the ions in solution are the products.​

PbCl₂(s) —-> Pb²⁺(aq) + 2 Cl-(aq)​
Kc = [Pb₂]∙[Cl-]² and we call it Ksp ​
“sp” stands for solubility product (no denominator)​

Question 3

What is Ba₃(PO₄)²​ Ksp

Answer 3

Ba₃(PO₄)²​ ​ —–> 3 Ba⁺² (aq) + PO₄ ^3-​ ​(aq)

Ksp = [Ba²⁺]³ + [PO₄^3-] ²

Question 4

Ksp is not…

Answer 4

the same as solubility​

Question 5

Solubility is…

Answer 5

is the quantity of a substance that dissolves to form a saturated solution (at equilibrium)

Question 6

Units for solubility are:

Answer 6

grams per liter (g/L) at equilibrium

moles per liter (mol/L) at equilibrium