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5 August, 09:12

If a hydrate of the formula

MCly? xH2O decomposes when heated to produce HCl, what change would you expect to occur when a piece of blue litmus paper is held in the path of the vapor released? [Litmus paper is paper impregnated with an acid-base indicator that is blue in the presence of base and red in the presence of acid.]

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  1. 5 August, 10:32
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    It will turn red

    Explanation:

    Bases will turn the litmus paper (impregnated with an acid-base indicator) blue.

    Acids will turn turn the litmus paper (impregnated with an acid-base indicator) red.

    Since the produced HCl is a strong acid, the litmus paper will turn red, when touching the HCl.

    The red shows the presence of an acid, in this case HCl.
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