## Question

###### 3. The Kp of calcium sulfate, Caso. is 7.1 x 10* while that of calcium hydroxide,...

3. The Kp of calcium sulfate, Caso. is 7.1 x 10* while that of calcium hydroxide, Catoi is 4.68 x 10 (a) Calculate the solubility of each salt. (b) Which salt is more soluble in water?

## Answers

(a)

1. The solubility equilibrium for CaSO_{4}is

The solubility product is,

If S is the molar solubility then we have,

....(1)

for CaSO_{4}x = y = 1

Therefor from eq(1) we have

...(2)

Given:- for CaSO_{4}

from eq(2) we have,

taking square root of both sides we get

solubility in g/dm^{3}

2.

The solubility equilibrium for Ca(OH)_{2}is

The solubility product is

if S is the molar solubility then we have,

...(1)

for Ca(OH)_{2}we have, x = 1 y = 2

Therefor from eq(1) we have,

...(2)

Given :- for Ca(OH)_{2}

From eq(2) we have,

taking cube root of both sides we get,.

(b)

The solubility of CaSO_{4}is 1.1462 g/dm^{3}while the solubility of Ca(OH)_{2}is 0.7802 g/dm^{3}.

Hence CaSO_{4}is more soluble salt in water than Ca(OH)_{2}.(S The general salubility evalilxium (S5 642 et) the ressim for Selubility prduet i SPf s isthe mel sauility of the compound then the euliLrum (mcentration o the ion im the Setu sated selu tiom uil be 20We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this image

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