
Blue litmus paper is dipped in a solution. It remains blue, what is the nature of the solution? Explain.
Answer
502.5k+ views
Hint: Litmus paper test is used to detect whether a given substance is acidic or basic. If a substance is acidic it would change the colour of blue litmus to red and if its basic it would change the colour of red litmus to blue. Also, if the substance is neutral it won’t change colour of either red or blue litmus paper.
Complete step by step answer:
We know that litmus test is used to detect whether the given substance is an acid or a base. If we put a drop of acid on red as well as blue litmus paper, the colour of blue litmus will change to red and that of red litmus would remain the same. If we put a drop of a base on both red and blue litmus paper, the colour of red litmus would change to blue while that of blue litmus remains the same. If we put a drop of a neutral solution on litmus of both the colours, no colour change would be observed on either coloured paper.
In the given situation, the colour of blue litmus remains blue, so the solution must either be a base or a neutral solution.
Additional information: Red litmus contains a weak diprotic acid. When it is exposed to a basic compound, the hydrogen ions react with the added base. The conjugate base formed from the litmus acid has a blue colour, so the wet red litmus paper turns blue in alkaline solution.
Note:
To confirm the nature of the given solution, we can put a drop of it on red litmus paper. If the paper turns blue, the solution is basic in nature and if its colour remains unchanged, the solution is neutral in nature.
Complete step by step answer:
We know that litmus test is used to detect whether the given substance is an acid or a base. If we put a drop of acid on red as well as blue litmus paper, the colour of blue litmus will change to red and that of red litmus would remain the same. If we put a drop of a base on both red and blue litmus paper, the colour of red litmus would change to blue while that of blue litmus remains the same. If we put a drop of a neutral solution on litmus of both the colours, no colour change would be observed on either coloured paper.
In the given situation, the colour of blue litmus remains blue, so the solution must either be a base or a neutral solution.
Additional information: Red litmus contains a weak diprotic acid. When it is exposed to a basic compound, the hydrogen ions react with the added base. The conjugate base formed from the litmus acid has a blue colour, so the wet red litmus paper turns blue in alkaline solution.
Note:
To confirm the nature of the given solution, we can put a drop of it on red litmus paper. If the paper turns blue, the solution is basic in nature and if its colour remains unchanged, the solution is neutral in nature.
Recently Updated Pages
The correct geometry and hybridization for XeF4 are class 11 chemistry CBSE

Water softening by Clarks process uses ACalcium bicarbonate class 11 chemistry CBSE

With reference to graphite and diamond which of the class 11 chemistry CBSE

A certain household has consumed 250 units of energy class 11 physics CBSE

The lightest metal known is A beryllium B lithium C class 11 chemistry CBSE

What is the formula mass of the iodine molecule class 11 chemistry CBSE

Trending doubts
Full Form of IASDMIPSIFSIRSPOLICE class 7 social science CBSE

How did Douglas overcome his fear of water class 7 english CBSE

What is the square root of 04 class 7 maths CBSE

Fill in the blanks with appropriate modals a Drivers class 7 english CBSE

The southernmost point of the Indian mainland is known class 7 social studies CBSE

What crosssections do you get when you give a Vertical class 7 maths CBSE
