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27 October, 07:41

An unknown acid contains only hydrogen, chlorine and oxygen, the acid was analyzed and found to contain 1.01% hydrogen and 35.29% chlorine with the remiander being oxygen. What is the emeprical formula

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  1. 27 October, 07:46
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    Empirical formula is HClO₄.

    Explanation:

    Given dа ta:

    Percentage of hydrogen = 1.01%

    Percentage of chlorine = 35.29%

    Percentage of oxygen = 100 - (35.29%+1.01%) = 63.7%

    Empirical formula = ?

    Solution:

    Number of gram atoms of H = 1.01 / 1.01 = 1

    Number of gram atoms of Cl = 35.29 / 35.5 = 1

    Number of gram atoms of O = 63.7 / 16 = 4

    Atomic ratio:

    H : Cl : O

    1/1 : 1/1 : 4/1

    1 : 1 : 4

    H : Cl : O = 1 : 1 : 4

    Empirical formula is HClO₄.
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