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19 May, 03:15

How many grams of hydrogen peroxide (H2O2) must be added to 1,500 mL of water to produce a concentration of 1.33 m (molal solution) ? (Recall that the density of water is 1.0 gram/mL.)

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  1. 19 May, 03:19
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    Given:

    1,500 mL of water

    1.33 m (molal solution

    Required:

    grams of hydrogen peroxide (H2O2

    solution:

    1.33 molal = 1.33 m = 1.33 moles H2O2/kg water

    1 gram/liter of water (1 liter/1000 mL) (1500mL) (1 kg/1000g) = 0.0015 kg water

    1.33 moles H2O2/kg water (0.0015 kg water) = 0.001995 moles H2O2

    Molar mass of H2O2 = 34 g/mol

    0.001995 moles H2O2 (34 g/mol) = 0.068 grams H2O2
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