Question

In washing powders, certain chemicals are added to impart the under-mentioned properties. Name the chemical used for each purpose.

Keep the washing powder dry

Answer 1

The long-chain carboxylic acids containing Ammonium $\left({{\mathrm{NH}}_4}^{+}\right)$ or Sulphonate $\left({{\mathrm{RSO}}_3}^{-}\right)$ salts are called detergents.

These detergents are used as washing powders for cleaning dirty and oily clothes.

The detergent is used in washing powders by weight $15-30\%$.

Sodium sulfate $\left({\mathrm{Na}}_2{\mathrm{SO}}_4\right)$ is used as a detergent filler. It keeps detergents dry.

The chemical used to keep the washing powder dry is Sodium silicate $\left({\mathrm{Na}}_2{\mathrm{SiO}}_3\right)$.