What will happen if you add a drop of the following on a cut unripe apple, curd, causting soda solution and soap soluton.(i) phenolphthalein (ii) litmus
Answers
Answer:
soap. 2. What will happen if you add a drop of the following on a cut unripe apple, curd, causting soda solution and soap soluton.
Answer:
(i) Phenolphthalein
Phenolphthalein remains colorless when applied on cut unripe apple and curd.
Phenolphthalein turns pink when used on caustic soda solution and soap solution.
(ii) Litmus
Litmus turns red when used on cut unripe apple and curd.
litmus turns blue when used on caustic soda and soap solution.
Explanation:
When the ph value is 7 the substance is neutral. If the ph value is less than 7 the substance is acidic and if the ph value is more than 7 the substance is basic.
1. The ph value of an apple is between 3.2 and 4.0 which means apple is acidic. Apple contains malic acid.
2. The ph value of curd is between 4.5 to 5.5 which means curd is acidic. curd contains lactic acid.
3. The ph value of caustic soda or sodium hydroxide is 12. Sodium hydroxide is one of the strongest alkalies.
4. The ph value of soap solution is between 8 and 9 which means the soap solution is basic. Sodium hydroxide is generally used to make soaps.