In a titration mishap

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

Problem

In a titration mishap,

0.010\,\text{mol}

of HCl is accidentally added to

100.0\,\text{mL}

of each of the following

NH_3

NH_4^{+}

buffer solutions. In which buffer will all of the HCl be completely neutralized while leaving some

NH_3

unreacted? (a)

0.10\,\text{M NH}_3\text{ and }0.10\,\text{M NH}_4^{+}

(b)

0.05\,\text{M NH}_3\text{ and }0.15\,\text{M NH}_4^{+}

(c)

0.15\,\text{M NH}_3\text{ and }0.05\,\text{M NH}_4^{+}

(d)

0.05\,\text{M NH}_3\text{ and }0.05\,\text{M NH}_4^{+}