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18 December, 21:44

How many milliliters of a 2.5 M LiOH solution are needed to completely neutralize 25 mL of a 1.0 M H2SO4 solution?

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  1. 18 December, 21:50
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    20 ml.

    Explanation:

    molarity of LioH (M1) = 2.5M

    Volume of LioH (V1) = ?

    Normality of LiOH (N1) = M1*valence factor=2.5*1=2.5 N

    Volume of acid H2SO4 (V2) = 25 ml

    molarity of acid H2SO4 (M2) = 1.0 M

    Normality of acid H2SO4 (N2) = M2*valance factor=1.0*2=2.0

    now, according to normality equation,

    V1. N1=V2. N2

    or, V1*2.5=25*2

    or, V1=50/2.5

    or, V1=20 ml

    Therefore, V1=20 ml.
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