Chemistry

Problem

Which of the following aqueous mixtures will most effectively resist changes in pH when small amounts of strong acid or base are added? a)

0.10\,\text{M}\;\mathrm{CH_3COOH}

and

0.10\,\text{M}\;\mathrm{NaCl}

0.10\,\text{M}\;\mathrm{HCl}

and

0.10\,\text{M}\;\mathrm{NaCl}

0.10\,\text{M}\;\mathrm{HF}

and

0.10\,\text{M}\;\mathrm{NaF}

0.10\,\text{M}\;\mathrm{CH_3COONa}

and

0.10\,\text{M}\;\mathrm{NaOH}