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21 September, 07:25

Calculate the percent by mass of 10 grams of calcium hydroxide mixed in 65 grams of water

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  1. 21 September, 07:38
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    13.3 %

    Explanation:

    Percent by mass indicates the mass of solute in 100g of solution.

    We must know the solution's mass:

    Solution's mass = Solute mass + solvent mass

    Solution's mass = 10 g + 65 g = 75 g

    Percent by mass = (10 g / 75 g).100 = 13.3 %

    Otherwise, we can make a rule of three:

    In 75 g of solution we have 10 g of solute

    In 100 g of solution we must have (100. 10) / 75 = 13.3 %
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