Question

The solubility of alkali metal hydroxide follows the order:

Answer 1

In the periodic table the order of basicity increases down the group due to larger atom size and unoccupied free orbitals.

LiOH<NaOH<KOH<RbOH<CsOH

Hope, this helps you.

Answer 2

Explanation:

The solubility order of metal hydroxides is as follows:

$<\mathrm{NaOH}<\mathrm{KOH}<\mathrm{RbOH}<\mathrm{CsOH}$

• Group IA elements are called as alkali metals. The elements are Lithium, Rubidium, sodium, Potassium and cesium.

• All these metals have one valence electron. That’s the reason all these elements are placed in the IA group of ‘the periodic table’.

• Alkali metals reacts with water to form metal hydroxide. The solubility of lithium to cesium increases.

The solubility order of IA group elements is as follows:

$L i O H<N a O H<K O H<R b O H<C s O H$