Question

# The acidic character of hydrides of group 16 elements increases from ${\mathrm{H}}_{2}\mathrm{O}$ to ${\mathrm{H}}_{2}\mathrm{Te}$. Why?

Open in App
Solution

## Compounds of hydrogen with less electronegative elements are known as hydrides.If the bond length between the element and hydrogen is long, it means that the bond is not strong. Therefore, the bond can be broken easily.Down the group, the $\mathrm{H}-\mathrm{E}$ bond length between the element and hydrogen increases and thus the enthalpy of the $\mathrm{H}-\mathrm{E}$ bond decreases down the group.The acidic character of hydrides of group 16 elements increases from ${\mathrm{H}}_{2}\mathrm{O}$ to ${\mathrm{H}}_{2}\mathrm{Te}$ because the bond dissociation enthalpy of the $\mathrm{H}-\mathrm{E}$ bond decreases down the group.

Suggest Corrections
1