Pl help Q 18 Integer. Type Questions
The molar solubility of AgCN in water considering hydrolysis of CN- ion is 1.66 x
what is the value of x? (Given that KS (AgCN) = 2.3 x 10-16 and Ka(HCN) 5 x 10-10)
17. Successive dissociation constants of H2S are and IW12, respectively. A one litre 0.1M
solution is buffered'at pH value 3. One litre of such H2S solution starts giving Ag2S precipitate after
adding 10-1 moles of AgN03, what is x? (Ignore volume change) (Ksp of Ag2S is ICF21)
18. A saturated 0.01 M H2S solution is buffered at pH 3 with exactly sufficient to not
precipitate PbS. Ka of H S = 10¯23 K of PbS = 10-28. The concentration of Pb+2 in the solution is
10-x. What is x ?
19. Determine the number of moles of Agl which may be dissolved in 1.0 litre of 1.0M CN- solution;
Ks for Agl and K f for are 10-17 M2 and 7.1 x 1019 respectively. If answer is
4.9 x then X =
20. A maximum of 10-1 moles of MgC12 could be dissolved in one litre of a solution containing 0.1 M
NH3 and, 0.01M NH} without causing precipitation of Mg(OH) . What is the value of
(Ka ofNH+4 = 10-8,K islo-16)
21. Solubility products of AC03, BS04 and AS04 are 4 x 10-10, 6 x 10-10 and 8 x 10-10 respectively. The
solubility product of BC03 is x x 10-10. What is x ?
22. Calculate the ratio of solubility of at 250C in 3.0 M NH3 (Ksp of AgC1 in NH3is
in H20 (Ks of AgCl in H20 is 1.8x10-10). If answer is 1.15 x 10K then x =
3. Calculate the concentration of free silver ion [Ag+] in an aqueous solution that is prepared
as 0.1 M AgN03 and 3.0 M NH3. Ag+(aq) + 2 1.6 If
answer is x x 10-10M then x =
