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19 September, 22:13

What mass of oxalic acid dihydrate, H2C2O4•2H2O, is needed to make a 0.357 M solution of oxalic acid in a 250.0mL volumetric flask?

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  1. 19 September, 22:40
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    Molarity is expressed as the number of moles of solute per volume of the solution. The mass of oxalic acid dihydrate needed for the solution is calculated as follows:

    Amount in moles: (0.357 mol H2C2O4•2H2O / L) (.250 L) = 0.0893 mol H2C2O4•2H2O

    Amount in mass : 0.0893 mol H2C2O4•2H2O (126.08 g / mol) = 11.2589 g H2C2O4•2H2O

    Hope this answers the question. Have a nice day.
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