Question

You are provided with three test tubes A, B and C as shown in figure with different liquids. What will you observe when you put (a) a piece of blue litmus paper in each test tube? (b) a piece of red litmus paper in each test tube? (c) a few drops of phenolphthalein solution to each test tube

Answer 1

answer: The given blue litmus paper is dipped in the given solutions. The solution which turns blue litmus red is acidic solution. Now Tear this blue litmus turned red into 2 halves. Now, the solution which turns it blue again is the acidic solution and the one which does not affect it is distilled water.

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Answer 2

We are provided that we are given three test tubes along with blue litmus paper, red litmus paper, and a few drops of phenolphthalein solution. The reactions when they are dipped in the test tubes will be:

• (A) When a blue litmus paper is dipped in a solution containing tartaric acid the paper turns red in color.
• When a blue litmus paper is dipped in soap solution it remains the same color.
• When a blue litmus paper is dipped in pure water it remains the same color.
• (B) When a piece of red litmus paper is dipped in a solution containing tartaric acid it remains red in color.
• When it is dipped in a test tube containing soap solution it turns blue in color.
• When it is dipped in pure water it does not change color.
• (C) When a few drops of phenolphthalein solution are added to a test tube containing tartaric acid it remains colorless.
• When a few drops are added to a soap solution the color changes to pink color.
• When a few drops are added to pure water it remains colorless.

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1. For questions like 'What is Litmus Paper. where it is used .how is it used for identifying acid and base.' please refer to:

https://brainly.in/question/7057278

2. For questions like 'What is the use of blue litmus paper in a laboratory?' please refer to:

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