Question

Meeta's mother complained that white deposits form on all her utensils used for cooking. Meeta knows that the deposits are of calcium carbonate that gets left behind when water in the utensils evaporates. She also knows that calcium carbonate reacts with hydrochloric acid. However, she realises that hydrochloric acid is not easily available and is too dangerous for her to use in the kitchen to remove the stains.
Suggest to Meeta a method that uses the same principle as she thought of, but solves the two problems she has with hydrochloric acid.

Answer 1

As hydrochloric acid is not easily available and is too dangerous to use in normal daily use, so, in place of hydrochloric acid, Meeta can use citric acid which is easily available and does not cause much harm. Citric acid can easily be obtained from the lemon.