Question

Precautions during study of comparative cleaning capacity of a sample of soap in soft and hard water

Answer 1

Answer:

lmportant precautions are:-)

1. For the experiment of cleaning capacity of a soap, always use cloth washing soap and not bathing soap or the synthetic detergent.

2. The quantity of ink drops put on each white cloth piece should be equal.

3. The ink spot on the cloth must be dried before washing with soap solutions.

4. Add sufficient amount of calcium chloride or magnesium chloride to the water to make it hard water.