Question

The $pH$ of pure water at ${50}^{o}C$ is:

($p{K}_w=13.26$ at ${50}^{o}C)$.

• A. $6.0$
• B. $6.63$
• C. $7.0$
• D. $7.13$

Answer 1

The correct option is B $6.63$

For pure water:

$pH$ $=\frac{1}{2}pkw$

So, $pH=$ $=\frac{1}{2}13.36$

= $6.68$ $\approx$ $6.63$ is the answer.