Which one of the following mixtures creates a buffer solution ?

Options

A. 10.0 mL 0.10 M NaOH+10.0 mL 0.10 M HF
B. 20.0 mL of 0.10 M NaOH +15.0 mL 0.10 M HF
C. 15.0 mL 0.10 M NaOH+20.0 mL 0.10 M HF
D. 10.0 mL 0.10 M NaOH+5.0 mL 0.20 M HF

Answer

c