Question

phenolphthalein is added to sodium hydroxide solution

Answer 1

The solution changes from colorless to pink in colour as sodium hydroxide is basic in nature.

Answer 2

While titration of sodium hydroxide solution we use phenolphthalein as an indicator. phenolphthalein turns colourless to pink at the end point

. to find out the molarity and strenth of a certain base we take some known quantity of acid and perform the titration
. we use phenolphthalein, add some drops to acid, and perform the titration
. just at end point( when all the reactants have reacted) the solution turns a liitle pinkish and we end the titration
. note down the amount of base used and further solve for molarity and strength


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