Question

If pure water has pKw 13.36 at 50°c find pH

Answer 1

for pure water
pH =
$\frac{1}{2} pkw$

so pH=
$\frac{1}{2} 13.36$

=6.68

Answer 2

Answer:

pH=6.68

Explanation:

We know that,

pKw=pH+pOH

for  pure water

pH=pOH

∴pKW=2pH

or

$pH=\frac{pKW}{2}$

∴ $pH=\frac{13.36}{2}$

          $= 6.68$