The $pH$ of an aqueous solution having hydroxide ion concentration as $1 \times 10^{-5} \ M$ is

The $pH$ of a solution having $[OH^{-}] = 10^{-7} \ M$ is

If the $pH$ of a solution is $4.0$ at $25\,^{\circ}C,$ its $pOH$ would be $(K_w = 10^{-14})$

When $NaCl$ is dissolved in water,the sodium ion becomes

At a certain temperature $T$,if the conductivity of pure water is $5.5 \times 10^{-7} \ S \ cm^{-1}$,calculate the $pH$ of water at the given temperature. Given: $\lambda_{H^{+}}^\infty = 350 \ S \ cm^2 \ eq^{-1}$ and $\lambda_{OH^{-}}^\infty = 200 \ S \ cm^2 \ eq^{-1}$.

The $pOH$ at which water is maximum dissociated at $25\,^{\circ}C$ is