Question

What is an indicator? [1]

Name the three acid-base indicators known to you. Also give their colors in acidic and

basic solutions​

Answer 1

Answer:

Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.

                                  LITMUS

                             Red Litmus Blue Litmus

Acidic solution Stays red Turns red

Basic solution Turns blue Stays blue

                                 METHYL ORANGE

                          Acidic      Basic

Methyl orange Red              Yellow

                                    PHENOLPHTHALEIN

                                 Acidic          Basic

Phenolphthalein Colourless Pink

Answer 2

Answer:

Hey , there!!!

An indicator is any chemical substance that gives you information about the solution that whether it is acidic or basic through a colour change.

Three acid-base indicators are:-

1) methyl orange

IN ACID- Orange

IN BASE- Yellow

2)bromophenol blue

IN ACID- Yellow

IN BASE- Blue

3) phenolphthalein

IN ACID- Colourless

IN BASE- Pink

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