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16 July, 04:57

An aqueous KNO3 solution is made using 74.0 g of KNO3 diluted to a total solution volume of 2.06 L. what is the mass percent

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  1. 16 July, 08:07
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    The mass % of KNO3 in the solution is 3.42 %

    Explanation:

    An aqueous KNO3 solution is made using 74.0 g of KNO3 diluted to a total solution volume of 2.06 L. what is the mass percent

    Assume a density of 1.05g/mL for the solution.

    Step 1: Data given

    Mass of KNO3 = 74.0 grams

    Volume = 2.06 L

    Molar mass of KNO3 = 101.10 g/mol

    Step 2: Calculate mass of the solution

    Mass solution = volume * density

    Mass solution = 2060 mL * 1.05 g / mL

    Mass solution = 2163 grams

    Step 3: Calculate mass of H2O

    Mass H2O = mass solution - mass KNO3

    Mass H2O = 2163 grams - 74.0 grams

    Mass H2O = 2089 grams H2O

    Step 4: Calculate mass % of KNO3

    % KNO3 = (mass KNO3 / mass solution) * 100%

    % KNO3 = (74.0 / 2163 grams) * 100%

    % KNO3 = 3.42%

    The mass % of KNO3 in the solution is 3.42 %
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