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8 October, 03:21

What is the percentage by mass of the solution formed when 22.0 grams of HCl is dissolved in 90.0 grams of water?

24.4%

22.48%

19.6%

16.7%

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Answers (1)
  1. 8 October, 05:31
    0
    Mass percentage (w/w%) can be calculated using the following equation

    mass percentage = mass of solute / mass of solution x 100 %

    solute is HCl and solvent is water.

    mass of solute is 22.0 g of HCl added

    mass of solution is the mass of solvent + mass of solute

    90.0 g of water and 22.0 g of HCl altogether make up - 90.0 + 22.0 = 112.0 g of solution

    therefore mass percentage of solution = 22.0 g / 112.0 g x 100 % = 19.6 %

    answer is 19.6%
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