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Assume that you are given a solution of an unknown acid or base. How can you tell whether the unknown substance is acidic or basic?

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Answer:

You would do a Ph test and if you were to use the regular materials for a Ph test then the color on your paper would decide if it were acidic or basic, if the color were to be red-ish then it would be an acid, if it were blue-ish then it would be a base

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Explanation:

Given a solution of an unknown acid or base, you can tell whether the unknown substance is acidic or basic using a moist litmus paper.

Litmus paper is a substance composed of an organic dye which changes its color depending upon the pH of a solution.

In acidic solutions, a moist blue litmus paper turns red while in a basic solution, a moist red litmus paper turns blue.

Hence, given a solution of an unknown acid or base, you can tell whether the unknown substance is acidic or basic using a moist litmus paper.

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