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23 June, 10:21

If you wanted to use 500 mL of a 0.1 Molar solution of a chemical for an experiment, and you only had a 0.5 Molar solution available, what could you do in order to get the solution that you wanted?

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  1. 23 June, 13:54
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    The answer to your question is given below.

    Explanation:

    To obtain the desired solution needed, we must obtain the volume of the stock solution required to prepare the solution. This is illustrated below:

    Step 1:

    Data obtained from the question include the following:

    Volume of stock solution needed (V1) = ... ?

    Molarity of stock solution (M1) = 0.5M

    Volume of diluted solution (V2) = 500mL

    Molarity of diluted solution (M2) = 0.1M

    Step 2:

    Determination of the volume of the stock solution needed.

    This can be obtained by using the dilution formula as shown below:

    M1V1 = M2V2

    0.5 x V1 = 0.1 x 500

    Divide both side by 0.5

    V1 = (0.1 x 500) / 0.5

    V1 = 100mL

    Therefore, to obtain the desired solution, measure 100mL of the 0.5M stock solution and dilute with water to the mark.
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