Question

Name the following:

A salt insoluble in cold water and soluble in hot water.

Answer 1

Salt

• When acid reacts with the base, it will form a salt
• To produce a salt, the hydrogen ion $\mathrm{\left(}{\mathrm{H}}^{\mathrm{+}}\mathrm{\right)}$ is replaced by the metal ion of the base.

Insoluble salt

• The salt which doesn't dissolve into water is called Insoluble salt.

Example

• Calcium sulfate $\left({\mathrm{CaSO}}_4\right)$, Barium sulfate $\left({\mathrm{BaSO}}_4\right)$

Soluble salt

• The salts which dissolves in Water $\left({\mathrm{H}}_2\mathrm{O}\right)$ is called soluble salt.

Example

• Sodium chloride $\left(\mathrm{NaCl}\right)$, Potassium chloride $\left(\mathrm{KCl}\right)$

The lead $\mathrm{\left(}\mathrm{Pb}\mathrm{\right)}$ containing salt is insoluble in cold water and soluble in hot water.

Lead sulfate $\mathrm{\left(}{\mathrm{PbSO}}_{\mathrm{4}}\mathrm{\right)}$ is insoluble in cold water and soluble in hot water.