Calculate gram equivalent mass of $\mathrm{KOH}$.

Definition:

Gram equivalent mass:

1. Gram equivalent mass can be defined as the mass of one equivalent of that substance.
2. That is the mass of a given substance that will combine with or displace a fixed quantity of another substance.

Given:

1. The atomic mass of potassium (K): 39.098 g.
2. The atomic mass of oxygen (O): 15.999 g.
3. The atomic mass of hydrogen: 1.008 g.

Solution.

1. The gram equivalent mass of $\mathrm{KOH}$ = $\mathrm{Mass}\mathrm{of}\mathrm{Potassium}\left(\mathrm{K}\right)+\mathrm{Mass}\mathrm{of}\mathrm{oxygen}\left(\mathrm{O}\right)+\mathrm{Mass}\mathrm{of}\mathrm{hydrogen}\left(\mathrm{H}\right)$

= $39.098\mathrm{g}+15.999\mathrm{g}+1.008\mathrm{g}$

= $56.105\mathrm{g}$

Gram equivalent mass of $\mathrm{KOH}$ is $56.105\mathrm{g}$.