1. The sodium salt of propanoic acid,
NaCH3CH2CO2, is used as an
antifungal agent by veterinarians. Calculate the equilibrium
concentrations of H3O+ and OH-,
and the pH, for a solution of 0.35 M
NaCH3CH2CO2.
Kb for
CH3CH2CO2- is 7.7 ×
10-10.
[H3O+] = --------------- M
[OH-] =----------------- M
pH =----------------------
2. Calculate the hydronium ion concentration and the pH when 35.0 mL of 0.75 M NH3 is mixed with 35.0 mL of 0.75 M (Ka = 5.6 * 10^-10 ).
Concentration --------------- M
pH-------------------------------
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