Five liquids are given. One is hydrochloric acid, sugar solution, sodium hydroxide,
tomato juice, salt solution. How will you Classify them into acids and bases with the
help of natural indicator(turmeric)?
Answers
EXPLANATION: Label the test tubes as A, B and C.
Dip the turmeric indicator in test tube A. If the turmeric paper changes to red then the liquid in the test tube is sodium hydroxide; which is a base. Otherwise, it is either hydrochloric acid or sugar solution; which is neutral.
If the liquid in the test tube A is not sodium hydroxide then keep it aside and repeat above procedure with the test tube B. If it is not sodium hydroxide then the liquid in test tube C must be sodium hydroxide.
Take aside the test tube with sodium hydroxide and pour sodium hydroxide in remaining two test tubes. The test tube which becomes warm contains acid. When acid and base neutralize each other, heat is released in the process
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