Question

A solution imports yellow colour with methyl orange and pink colour with phenolphthalein. Identify the nature of the solution. Also mention the ph range of the solution

Answer 1

Explanation:

Solution A is basic solution the pH range in between 7 to 14

Solution B is acidic solution the pH range in between 0 to 7.

Hence, solution A has higher pH value.

The chemical substances which are useful to identify the acidic or basic behavior of the solutions by changing of their color are known as acid – base indicator.

The example is in the image given below.

Solution A gives pink color when a drop of phenolphthalein indicator is added to it, hence, it is a basic solution and pH range in between 9-10.

Solution B gives red color when a drop of methyl orange is added to it, hence, it is an acidic solution and pH range in between 4-6.

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