Question

Give reasons for the $H_{2}O$ is less acidic than $H_{2}S$.

Answer 1

The $S-H$ bond is weaker than the $O-H$ bond due to which $H_{2}S$ more easily donates a proton and is, therefore, more acidic.

The $H_{2}O$ bond is stronger than the $H_{2}S$ due to the presence of intermolecular hydrogen bonding.