A pupil adds 5 cm of 12 mol.dm sulphuric acids to make a 250 cmº solution. Calculate the concentration of the diluted acid.

Question

A pupil adds 5 cm of 12 mol.dm sulphuric acids to make a 250 cmº solution. Calculate the
concentration of the diluted acid.

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Amity 6 months 2021-07-26T21:39:46+00:00 1 Answers 4 views 0

Answers ( )

    0
    2021-07-26T21:41:29+00:00

    Answer:

    0.500 mol/dm³

    Explanation:

    Using the formula below;

    CaVa = CbVb

    Where;

    Ca = concentration of acid (mol/dm³)

    Cb = concentration of base (mol/dm³)

    Va = volume of acid (cm³)

    Vb = volume of base (cm³)

    In accordance to the information provided in this question is;

    Va = 5cm³

    Vb = 250 cm³

    Ca = 12 mol/dm³

    Cb = ?

    Using CaVa = CbVb

    12 × 5 = Cb × 250

    60 = 120Cb

    Cb = 60/120

    Cb = 0.500 mol/dm³

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