in a stration of eyanide ion, 28.72 mL of 0.0100 M AgNO3 is added before precipi

Question

in a stration of eyanide ion, 28.72 mL of 0.0100 M AgNO3 is added before precipitation begins. (The reaction of Ag with CN goes to completion. producing the Ag(CN) complex ] Precipitation of soid AgCN takes place when excess Ag' is added to the solution, above the amount needed to complete the fomation of Ag(CN)-How many grams of NaGN were in the original sample? QUESTION 2 The Ksp of Pol2 s 1.4 ? 10 s calculate the molar solubilty of leadi) iodide. QUESTION 3 The Ksp of Agl is 1.5x 1?16. Calculate the molar solubility of siver iodide. (Use E for x10, example: Ksp given would be written 1.5E-16.) QUESTION 4 Which of the following slightly soluble compounds has a solubility greater than that caloulated from its solubility product because of hydrolysis of the anion present? Baso4 CaF2 Ho2l ZnS

Explanation / Answer

question 2)

The reaction is given as :

Pb2+ (aq) + 2 I- (aq) ----------> PbI2 (s)

where

Ksp = [Pb2+][I-]^2

if molar solubility of PbI2 is S

then

Ksp = S x (2S)^2 = 4 S^3

and

1.4 x 10^-8 = 4 S^3

S^3 = 3.5 x 10^-9

or

S = 1.5 x 10^-3 M

thus

molar solubility of PbI2 is = 1.5 x 10^-3 M

Question 3)

The reaction is given as :

Ag+ (aq) + I- (aq) ----------> AgI (s)

where

Ksp = [Ag+]*[I-]

if molar solubility of AgI is S

then

Ksp = S x S = S^2

and

1.5 x 10^-16 = S^2

S^2 = 1.5 x 10^-16

or

S = 1.23 x 10^-8 M

thus

molar solubility of AgI is = 1.23 x 10^-8 M

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.