Of HNO₃ is mixed with of KOH at

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

Problem

50.0\,\text{mL}

0.10\,\text{M}

HNO₃ is mixed with

25.0\,\text{mL}

0.20\,\text{M}

KOH at

25\,^{\circ}\text{C}

. Which of the following best describes the

pH

of the resulting solution? (a)

pH < 7

because the strong acid is present in a larger volume than the base. (b)

pH \approx 12

because the base solution is twice as concentrated as the acid solution. (c)

pH \approx 7

because the number of moles of

\mathrm{H^+}

and

\mathrm{OH^-}

are equal. (d)

pH > 7

because the salt

\mathrm{KNO_3}

produced makes the solution slightly basic.