A 1.0 L buffer is prepared by dissolving 0.50 mol H CO and 0.50 mol HCO (pK = 6.35)

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

A 1.0 L buffer is prepared by dissolving 0.50 mol H

_2

_3

and 0.50 mol HCO

_3^-

(pK

_\mathrm{a1}

= 6.35). After 0.010 mol of HCl is added with negligible volume change, what is the resulting pH of the solution? (a)

6.17

(b)

6.35

(c)

6.33

(d)

5.35