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27 September, 06:43

A student needs to prepare 250 mL of a 0.550 M aqueous solution of sucrose, C 12 H 22 O 11 (aq), which is used frequently in biological experiments?

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  1. 27 September, 06:52
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    Dissolve 47.025 grams of sucrose in enough water to produce 250 ml of solution.

    Explanation:

    You need to prepare 250. mL of a 0.550 M aqueous solution of sucrose, C12H22O11 (aq),

    which is used frequently in biological experiments.

    Based on your answer above, what is the value of x?

    Solution:

    A 0.550 M aqueous solution contains 0.550 mole of sucrose per liter of solution.

    250 ml = 0.250 liter

    Thus a 0.250 liter of a 0.550 M aqueous solution of sucrose contains 0.250 * 0.550 = 0.1375 mole of sucrose

    Recall:

    Mass = number of moles * mass of 1 mole

    mass of 1 mole of C12H22O11

    = 12 (12) + 1 (22) + 16 (11)

    = 144 + 22 + 176

    = 342 grams

    Mass = 0.1375 * 342 = 47.025 grams of sucrose.

    Dissolve 47.025 grams of sucrose in enough water to produce 250 ml of solution.
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