Question

What is the solubility of la(io₃)₃ in water? (ksp of la(io₃)₃ is 7.5 × 10⁻¹²)

Answer 1

Given its solubility product is 7.5 × 10⁻¹², the solubility of La(IO₃)₃ in water is 7.3 × 10⁻⁴ M.

What is solubility?

Solubility (S) is the maximum amount of a solute that can be dissolved in a certain amount of a solvent.

• Step 1: Make an ICE chart for the solution of La(IO₃)₃ in water.

        La(IO₃)₃(s) ⇄ La³⁺(aq) + 3 IO₃⁻(aq)

I                               0                   0

C                             +S               +3S

E                               S                 3S

• Step 2: Write the solubility product constant (Ksp).

Ksp = [La³⁺] [IO₃⁻]³ = (S) (3S)³ = 27 S⁴ = 7.5 × 10⁻¹²

S = 7.3 × 10⁻⁴ M

The solubility of La(IO₃)₃ in water is 7.3 × 10⁻⁴ M.

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