A student prepared solution of (i) an acid and (ii) a base in 2 separate beakers . she forgot to label them and litmus paper is not available in the laboratry . Since, both the solutiobs are colourless, how will she distinguish between the two?

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Solution

Add a few drops of phenolphthalein indicator to both the beakers. The acid solution will remain colourless whereas the basic solution will turn pink. Similarly, add few drops of liquids from both beakers to turmeric powder. The basic solution will turn turmeric powder red whereas the yellow colour of turmeric powder will not change on adding acid.

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Q. A student prepared solution of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since, both the solutions are colourless, how will she distinguish between the two ?

A student perpared solution of a acids and a base in two separate breakers she forgot to label the solution and litmus paper is not available in the lab , since both the solution are colours less how will she distinguish the two

Q. How can we distinguish between acids and bases using the litmus paper indicator?

A student prepared 20% sodium hydroxide solution in a beaker to study saponification reaction. Some observations related to this are given below:

(I) Sodium hydroxide solution turns red litmus blue
(II) Sodium hydroxide readily dissolves in water
(III) The beaker containing solution appears cold when touched from outside
(IV) The blue litmus paper turns red when dipped into the solution

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