Question

The solubility-product constant (Ksp) for MnCO3 at 25°C is 2.2 ✕ 10−11. What is the molar...

The solubility-product constant (Ksp) 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 Qsp or Ksp, 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. (Ksp 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. (Ksp 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.

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