SAMPLE PROBLEM 18.12
Predicting the relative acidity of salt solutions from Ka and Kb of the ions
SOLUTION:
Ka Zn(H2O)62+ = 1 x 10-9
Ka HCOOH = 1.8 x 10-4 ; Kb = Kw/Ka = 1.0 x 10-14/1.8 x 10-4 = 5.6 x 10-11
Ka for Zn(H2O)62+ > Kb HCOO-; the solution is acidic.
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