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28 April, 17:52

An aqueous solution of sodium hydroxide is standardized by titration with a 0.170 M solution of perchloric acid. If 28.5 mL of base are required to neutralize 16.0 mL of the acid, what is the molarity of the sodium hydroxide solution?

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  1. 28 April, 18:06
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    0.095M

    Explanation:

    HClO4 + NaOH = NaClO4 + H2O

    Concentration of acid CA = 0.170M

    Concentration of base CB=?

    Volume of base VB = 28.5ml

    Volume of acid VA = 16.0ml

    Number of moles of acid nA = 1

    Number of moles of base nB = 1

    From

    CAVA/CBVB = nA/nB

    CB = CAVAnB/VBnA

    CB = 0.170*16.0*1/28.5*1

    CB = 0.095M
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