question_answer

  Account for the following (a) Antacid tablets are used by a person suffering from stomach pain (b) Toothpaste is used for cleaning teeth. (c) Dry HCl gas does not change the colour of dry litmus paper.

Answer:

                  (a) Since, vineger (acetic acid) is used to heal or neutralise the effect of wasp stings, this means the chemical present in the stings must be some base. (c)    Since, bee stings are treated by baking soda which is a base, this means they must contain in them some acid. If baking soda is not available in the house, solution of ammonium hydroxide can be used for the same purpose.