The correct formula to calculate the hydroxyl ion concentration of an aqeous solution of `NH_(4)NO_(3)` is:

The hydroxyl ion concentration in 0.001 (M) HCl solution is

The hydroxyl ion concentration in a solution having pH = 4 will be

pH of a solution is 5. Its hydroxyl ion concentration is

The hydroxyl ion concentration in a solution having pH value 3 will be :

The hydroxyl ion concentration in a solution having pH value 3 will be :

Calculate the hydrogen ion and hydroxyl ion concentration of 0.01 M solution of NaOH at 298 K.

K_(a) for butyric acid is 2.0xx10^(-5) . Calculate pH and hydroxyl ion concentration in 0.2M aqueous solution of sodium butyate.