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10 August, 14:09

110. A sports drink" contains 55 mg of potassium ions per 400 ml

serving. Calculate the concentration of the potassium ions in ppm.

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  1. 10 August, 15:09
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    The concentration of the potassium ions in ppm is 137.5 ppm

    Explanation:

    Here, we are interested in calculating the concentration of the potassium ions in ppm.

    Mathematically, the term ppm which is read as parts per million is = mg of solute/liter of solution

    We already have the mg of solute as 55mg

    all we need now is the liters of solution

    But what we have is 400 ml which is read as 400 milliliters

    Mathematically, 1000 ml = 1l

    Thus 400 ml = 400/1000 L = 0.4 L

    Now the ppm = 55mg/0.4L = 137.5 mg/L or simply 137.5 ppm
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