Chemistry

Problem

Use the expression:

\text{pH} = -\text{log}_{10} [\text{H}^+(\text{aq})]

to calculate the theoretical pH of an aqueous solution of hydrochloric acid of concentration

1.0 \times 10^{-8} \text{ mol dm}^{-3}

25^\circ\text{C}

. The experimental value is 6.98. Explain the differences between the two values.