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What volume of distilled water should be added to 400cm3 of 2.0mol/dm 3 H2SO4 to obtain 0.20mol/dm3 of solution

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cc1 x M1 = cc2 x M2
400 x 2.0 = cc2 x 0.2M

cc2 gives the TOTAL volume. Subtract 400 to find the volume that must be added.

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