Why does solubility of metal hydroxides increases down the group?

Group II metal hydroxides become more soluble in water as you go down the column. This trend can be explained by the decrease in the lattice energy of the hydroxide salt and by the increase in the coordination number of the metal ion as you go down the column.

Why does the solubility of alkali hydroxides increase down the group?

So, the solubility of alkali metal hydroxides increases down the group. The hydroxides, fluorides and oxalates of these elements solubility increases down the group. This is due to the decrease in lattice energy of the hydroxide salt(in case of hydroxides) and the size of the cation increases down the group.

Why does the solubility of alkaline earth metal hydroxides in water decrease down the group?

The size of anions being much larger as compared to cations, the lattice enthalpy will remain almost constant within a particular group. Since the hydration enthalpy decreases down the group, solubility will decreases as found for alkaline earth metal carbonates and sulphates.

Why does the solubility of Group II hydroxides increase and the solubility of sulphates decrease down the group?

The hydration enthalpy also decreases since the size of the cation increases. However, due to the square factor, the lattice enthalpy decreases faster than the hydration enthalpy. This is why the solubility of Group 2 hydroxides increases while progressing down the group.

Why is LiOH less soluble in water?

Except lithium hydroxide,all the alkali metal hydroxides are highly soluble in water. LiOH is much less soluble on account of high lattice enthalpy.

Are all metal hydroxides soluble in water?

Most metal hydroxides are insoluble; some such as Ca(OH)2, Mg(OH)2, Fe(OH)2, Al(OH)3 etc.

Does lithium hydroxide dissolved in water?

Lithium hydroxide is an inorganic compound with the formula LiOH(H2O)n. Both the anhydrous and hydrated forms are white hygroscopic solids. They are soluble in water and slightly soluble in ethanol.

How does the solubility of alkaline earth metal hydroxides vary down the group?

Since lattice enthalpy decreases much more than the hydration enthalpy with increasing ionic size, the solubility of alkaline earth metal hydroxides in water increases down the group. (ii)The size of anions being much larger compared to cations the lattice enthalpy will remain almost constant with in a particular group.

What are the hydroxides of s-block metals?

When the hydroxides of the s-block metals are discussed, it’s easier to separate between the group 1 elements and the group 2 elements. These hydroxides are the strongest bases in the aqueous medium and are highly corrosive.

Why does solubility of Group 2 hydroxides increase while progressing down the group?

The hydration enthalpy also decreases since the size of the cation increases. However, due to the square factor, the lattice enthalpy decreases faster than the hydration enthalpy. This is why the solubility of Group 2 hydroxides increases while progressing down the group. Now let’s look at $\\ce{SO4^2-}$.

What is the solubility of metal hydroxides with colours?

List of metal hydroxides solubility with colours Metal hydroxide Solubility Colour of in the water LiOH soluble colourless solution NaOH soluble colourless solution KOH soluble colourless solution Be (OH) 2 insoluble a white precipitate with colourless solu