A buffer solution contains 0.467 M hydrocyanic acid and 0.346 M sodium cyanide . If 0.0303 moles of potassium hydroxide are added to 250 mL of this buffer, what is the pH of the resulting solution

Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m