Question

give reason

Universal indicators are used to determine pH of a substance.​

Answer 1

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Whether a solution is acidic or basic can be measured on the pH scale. When universal indicator is added to a solution, the color change can indicate the approximate pH of the solution. Acids cause universal indicator solution to change from green toward red.

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Answer 2

Explanation:

Universal indicators are mixtures of several different pH indicators that extend the pH range over which they operate. Bogen universal indicator is a mixture of methyl red, bromthymol blue, and phenolphthalein, and indicates on a wide pH range of 4.0 to 10.0 in discrete color steps