Question

- A 0.171 M weak acid solution has a pH of 4.34. Find Ka for the acid.

- Find the percent ionization of a 0.230 M HC2H3O2 solution. (The value of Ka for HC2H3O2 is 1.8×10−5.)   

- Find the pH of a 0.0221 M solution of hypochlorous acid. (The value of Ka for hypochlorous acid is 2.9×10−8.)

- Find the pH of a 0.012 M solution of HNO2. (The value of Ka for HNO2 is 4.6×10−4.)

- Find the [H3O+] concentration of a 0.307 M  nitrous acid solution. (The value of Ka for nitrous acid is 4.6×10−4.)   

- For each strong base solution, determine [H3O+], [OH−], pH, and pOH.
2.2×10⁻⁴ M KOH and 5.3×10⁻⁴ M Ca(OH)2

- Find the [OH−] of a 0.25 M aniline (C6H5NH2) solution. (The value of Kb for aniline (C6H5NH2) is 3.9×10−10.)

- Find the pH of a 0.25 M aniline (C6H5NH2) solution.

- Determine the [OH−] of a 0.22 M solution of NaHCO3 and determine the pH of this solution..

- Find the pH of a 0.268 M NaF solution. (The Ka of hydrofluoric acid, HF, is 3.5×10−4.)   

Answer 1