Question

what are indicators and name all indicators??​

Answer 1

Answer:

Indicators

Name Acid Color pH Range of Color Change

Litmus Red 5.0 - 8.0

Bromothymol blue Yellow 6.0 - 7.6

Thymol blue Yellow 8.0 - 9.6

Phenolphthalein Colorless 8.2 - 10.0

Explanation:

lndicators derived from natural sources are called natural indicators. eg:- Litmus , red cabbage , turmeric , china rose petals etc.. lndicators prepared in laboratary are callwd synthetic indicators. lndicators which give different odours in acidic and basic medium

Answer 2

Answer:

Indicators are substances whose solutions change color due to changes in pH. These are called acid-base indicators. They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra. Did you know that the color of hydrangea flowers depends on the pH of the soil in which they are grown.

Explanation:

Common indicators include:

Litmus: A dye extracted from various species of lichen that changes colour around the neutral range.

Phenolphthalein: A synthetic indicator that changes colour in the basic range.

Methyl orange: A synthetic indicator that changes colour in the acidic range.

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