Page 96 - Basic physical chemistry for the atmospheric sciences

82 Basic physical chemistry

fo
fo
4. 1 7 . Write the expression r the solubility product r each of
the following reactions.
(a) Ag2Cr0 (s) +:t2Ag +(aq) + C ro� - (aq)
4
2
(b) CaS0 ( s ) +:tCa + (aq) + S o� - (aq)
4
(c) CH3COOH(l) +:t H + (aq) + C H3COO -(aq)
4. 1 8 . The Ksp value r calcium carbonate (CaC03) is 2.8 x 10- 9
fo
at 25°C. What is the solubility of CaC03 in water in grams
per liter?
4 . 1 9 . The concentration of Ag+(aq) in a solution is 2.0 x 1 0 - 4
M . What concentration must 1 - (aq) reach before Agl(s)
precipitates? The solubility of Agl(s) is 8.5 x 1 0 - 11•
4 . 2 0. Calculate the molar solubility of lead sulfate, PbSOis), in
(a) pure water, and (b) a 0. 1 0 M solution of lead nitrate,
Pb(N03)2• The solubility product for lead sulfate is
1 . 6 X 0 - 8•
1