Question

If x represents the molar solubility of Ca(OH)2 , what is the correct equation for the K sp ?

Ksp=x^2
Ksp=2x^3
Ksp=4x^3
Ksp=x^3

Answer 1

Answer:

Ksp = 4x³

Explanation:

Step 1: Write the reaction for the solution of calcium hydroxide

Ca(OH)₂(s) ⇒ Ca²⁺(aq) + 2 OH⁻(aq)

Step 2: Make an ICE chart

Let "x" be the molar solubility of calcium hydroxide.

        Ca(OH)₂(s) ⇒ Ca²⁺(aq) + 2 OH⁻(aq)

I                                 0                  0

C                              +x               +2x

E                                x                 2x

Step 3: Write the expression for the solubility product constant (Ksp)

The solubility product constant is equal to the product of the concentrations of the products raised to their stoichiometric coefficients.

Ksp = [Ca²⁺] × [OH⁻]² = x × (2x²) = x × 4x² = 4x³

Answer 2

if $x$ represents the molar solubility of  calcium hydroxide then  correct equation for the Ksp is $\bold {x^3}$

Solubility product constant Ksp:

It is the equilibrium constant for a solid substance that are dissolved in an aqueous solution. It expresses how much a solute is dissolved in solution.

   

The reaction of calcium hydroxide for the solution  

$\bold {Ca (OH )_2(s) \rightarrow Ca^2^+(aq) + 2 OH^-(aq)}$  

1 mole of calcium hydroxide is dissociate into 1 mole of calcium ion and 2 moles of Hydroxil ion.

The Ksp equation for the solution,

$\bold {Ksp =[Ca^2^+][ OH^-]^2}$

If $x$ represents molar solubility,

$\bold {Ksp =[x][ x]^2 = x^3}$

Therefore, if $x$ represents the molar solubility of  calcium hydroxide then  correct equation for the Ksp is $\bold {x^3}$

To know more about Ksp,

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