Question

The solubility-product constant (K_sp) for MnCO₃ at 25°C is 2.2 ✕ 10⁻¹¹. What is the molar solubility of this substance in 0.22 M MnCl₂ at 25°C?

AND

Calculate the Q_sp or K_sp, as indicated, and determine whether a precipitate will form when each of the following mixtures is prepared. (You may assume temperature is held constant, volumes are additive, and that the initial solutions, prior to mixing, are unsaturated.)

(a) 25.12 mL 1.30 ✕ 10⁻⁴M CaCl₂ is mixed with 25.19 mL 3.02 ✕ 10⁻³M NaF. (K_sp for CaF₂ = 3.5 ✕ 10⁻¹¹)

Qsp

A precipitate will form or A precipitate will not form.

(b) 14.95 mL 3.50 ✕ 10⁻³M Pb(NO₃)₂ is mixed with 34.92 mL 1.69 ✕ 10⁻⁴M Na₂SO₄. (K_sp for PbSO₄ = 2.5 ✕ 10⁻⁸)

Qsp

A precipitate will form or A precipitate will not form.

(c) 50.42 mL 2.59 ✕ 10⁻²M Pb(NO₃)₂ is mixed with 25.08 mL 4.83 ✕ 10⁻⁵M NaBr. (molar solubility of PbBr₂ = 1.2 ✕ 10⁻²M)

Qsp
Ksp

A precipitate will form or A precipitate will not form.

Answer 1

answered by: anonymous