Question

Acids turn blue litmus to ______.

Answer 1

Purpose of litmus paper:

(1) The litmus paper gives a general indication of acidity or alkalinity.

(2) Under the acidic conditions, the blue paper turns red when the pH level is below 4.5.

(3) In contrast, the red paper does not change its color under alkaline conditions where the pH level is above 8.3.

(4) Blue litmus doesn’t change its color under alkaline conditions, while the red one doesn’t change its color under acidic conditions.

(5) Acids turn blue litmus red. When blue litmus paper is placed in an acidic substance, it will turn red. However, if placed in a substance that is basic or neutral, it will remain blue.

Therefore, acids turn blue litmus to red.