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18 September, 00:00

An experimental procedure requires 10 ml of acid to be dissolved into a beaker of water. An additional 5 ml of acid is added to the solution. Which statement best describes the new solution?

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  1. 18 September, 00:10
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    If we dissolve 10 mL of acid into a beaker of water. The acid will be diluted.

    Since the number of moles of acid will not change, we can use this formula:

    M1 V1 = M2 V2

    Where M is the concentration of the acid in the solution

    V1 = 10 mL

    and

    V2 = Vwater + 10

    If we add an additional 5 mL of acid, the new concentration of the acid will be:

    M = (M1 (5mL) + M2 (Vwater + 10mL)) / (5mL + Vwater + 10mL)

    The concentration of acid in the new solution will increase.
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