An indicator does which one of the following in the presence of acids and bases?

Answer 1

Indicators can be used to determine if a substance is a acid or a base because of the reaction that occurs between the substance and the indicator. This creates a color change in the indicator (depending on which indicator you use). If it is a universal indicator, the substance may change from deep red to violet. If it is a litmus indicator, it will only turn either red or blue.

Answer 2

An indicator is a substance that changes color in response to changes in acidity or alkalinity (pH). In the presence of acids, indicators change color to indicate acidity, and in the presence of bases, they change color to indicate alkalinity. This color change helps to visually determine the pH of a solution.

Answer 3

Blue litmus paper, red litmus paper, wide range paper.

You can also use Phenolphthalein, Bromo.Blue, Methyl Orange or the Universal Indicator (these are liquids)

Answer 4

changes color

Answer 5

Phenolphthalein. :)

Answer 6

red acid blue base

Answer 7

color changes.