The concentration of $H^{+}$ ions in $0.1 \, M \, NaOH$ is .......

What is the $pH$ of a $2.6 \times 10^{-8} \ M \ H^{+}$ ion solution?
$(\log 2.6 = 0.4150)$

$pH$ of a $10 \ M$ solution of $HCl$ is

The gastric juice in our stomach contains enough $HCl$ to make the hydrogen ion concentration about $0.01 \, mole/litre$. The $pH$ of gastric juice is

What is the $pH$ of a $10^{-4} \ M \ OH^{-}$ solution at $330 \ K$,if $K_w$ at $330 \ K$ is $10^{-13.6}$?

Given $pH$ of a solution $A$ is $3$ and it is mixed with another solution $B$ having $pH$ $2$. If both are mixed in equal volumes,then the resultant $pH$ of the solution will be