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12 December, 04:27

D5W is a solution used as an intervenous fluid. It is 5.0% by mass solution of the dextrose (C6H12O6) in water. if the density of D5W is 1.029 g/ml. Calculate the molarity of the dextrose in the solution.

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  1. 12 December, 07:11
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    0.29 mol/L

    Explanation:

    Its density is 1.029 g/ml so in a liter (1000 mL) there is 1029 g of solution, but only 5% is dextrose.

    0.05x1029=51.45

    So in a liter of D5W solution there is 51.45 g of dextrose.

    Dextrose molar mass iss 180.156 g/mol, so in 51.45 g of dextrose there is

    51.45/180.156=0.29 mol

    In one liter of solution there is 0.29 mol of dextrose, so the molarity of such solution is 0.29 mol/L.
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