Question

if you dip pH poper in o given solution turns to bluish: colour and matches with 11 on a ph Scale What is it referring to us? ​

Answer 1

Answer:

I think question is wrong.

It is not possible for 11 ph to change ph paper (litmus paper) blue. Blue comes for solutions with PH of 7-10.

11 PH will show green colour.

Explanation:

If PH is somewhere between 7 to 10, then it means that the solution is mildly alkaline, that is, it contains the OH- ion.

Examples of such substances include :

1. Baking Soda (Sodium Bicarbonate; NaHCO3) with PH 9
2. Tap water with pH 7 to 8.5
3. Human Blood with pH 7.2

If pH is 11, then the solution is strongly alkaline, like Ammonia (NH3) and it will change litmus paper to green colour.

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Answer 2

It is referring that the solution is basic.

• In pH paper 7 is the neutral range.
• Above 7 to 14 is the basic range and below 7 to 1 is the acidic range.
• Base changes the colour of a solution to blue and acid change the colour to red.
• If I drop a pH paper in a given solution turns to a bluish colour and matches with 11 on a pH scale then it refers to basic solution.