Question

Determine the molar solubility of AgBr in a solution containing 0.150 M NaBr. Ksp (AgBr) = 7.7 × 10-13.

Determine the molar solubility of AgBr in a solution containing 0.150 M NaBr. Ksp (AgBr) = 7.7 × 10-13.

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Answer #1
Concepts and reason

The concept used in this problem is based on the solubility product.

Find the molar solubility of a given compound in the specific solution with the help of expression of solubility product.

Fundamentals

Solubility product:

Solubility product basically defines the equilibrium between solids and its respective ions in the solution. The value of the solubility product represents the degree to which a chemical compound dissociates in water.

Example –

The dissociation reaction of ionic solid is given as shown below.

AB(s)=A* (aq)+B (aq)

The expression corresponding to the solubility product is given as shown below.

K. =[A+][B]

The balanced chemical equation for the dissociation reaction of is as follows:

AgBr → Ag* +Br

The expression corresponding to the solubility product is given as shown below.

Ko =[Ag+ ][Br]
…… (1)

The molar solubility of is calculated as shown below.

Consider the is the molar solubility of the given compound.

Substitute 0.150 M
as the concentration of bromide ion and 7.7x10-13
as the of in the equation .

7.7x10-13 = Sx(0.150 M)
S-7.7x10-13
0.150 M
= 5.1x10-12 M

Ans:

The molar solubility of AgBr
is 5.1 x 10-12 M
.

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