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28 December, 09:11

You wish to make a 0.435 M perchloric acid solution from a stock solution of 3.00 M perchloric acid. How much concentrated acid must you add to obtain a total volume of 150 mL of the dilute solution?

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  1. 28 December, 11:02
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    The answer to your question is 21.75 mL of stock solution of [HClO₄]

    Explanation:

    Data

    [HClO₄] = 0.435 M

    Stock solution [HClO₄] = 3 M

    Total volume = 150 mL

    Formula

    Concentration 1 x Volume 1 = Concentration 2 x Volume 2

    - Solve for Volume 1

    Volume 1 = Concentration 2 x Volume 2 / Concentration 1

    - Substitution

    Volume 1 = 0.435 x 150 / 3

    - Simplification

    Volume 1 = 65.25 / 3

    - Result

    Volume 1 = 21.75 mL
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