Question

What was the colour of litmus paper in the sodium hydroxide solution?​

Answer 1

The colour of red litmus paper in a sodium hydroxide solution would turn blue, indicating the basic nature of the solution.

Step-by-step explanation:

When sodium hydroxide (NaOH), which is a base, is dissolved in water, it will turn red litmus paper blue. This is because litmus paper is a pH indicator that changes color in response to the acidity or alkalinity of a solution it is placed into. When in an acidic environment, blue litmus paper will turn red, while in a basic or alkaline environment, red litmus paper will turn blue. Sodium hydroxide, being a strong base, will result in a blue color change on red litmus paper, which indicates that the solution is alkaline.

Answer 2

It turns a greenish color.

Step-by-step explanation:

When it's dipped into a vial of sodium hydroxide, or NaOH, which is basic, it turns a greenish color. When pH paper is in the presence of pure water, it turns purple. Note that litmus paper only turns two colors: red for acids and blue for bases.