Science, asked by Pinkinad, 1 year ago


1 What are universal indicators and what are their uses?​

Answers

Answered by rajputswag5
16

Answer:

it is the mixture of indicators. it is used to know that how an substance is acidic or basic by changing it's colour

Answered by vanshkumar68
2

Answer:

A universal indicator is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. Although there are several commercially available universal pH indicators, most are a variation of a formula patented by Yamada in 1933.[1] Details of this patent can be found in Chemical Abstracts.[2] Experiments with Yamada's universal indicator are also described in the Journal of Chemical Education.[3]

A universal indicator is typically composed of water, propan-1-ol, phenolphthalein sodium salt, sodium hydroxide, methyl red, bromothymol blue monosodium salt, and thymol blue monosodium salt.[4] The colours that indicate the pH of a solution, after adding a universal indicator, are:

Explanation

pH range Description Colour

< 3                Strong acid Red

3–6                 Weak acid Orange or yellow

7                  Neutral Green

8–11                   Weak alkali        Blue

> 11                      Strong alkali Violet or Indigo

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