what is the molarity of a solution made by dissolving 18.5 grams of NaCL into enough water to reach 450.0ML​

Question

what is the molarity of a solution made by dissolving 18.5 grams of NaCL into enough water to reach 450.0ML​

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Thu Giang 2 months 2021-07-22T18:07:49+00:00 1 Answers 4 views 0

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    2021-07-22T18:09:15+00:00

    Answer:

    0.702M

    Explanation:

    Molarity of a solution, which refers to the molar concentration of that solution can be calculated thus;

    Molarity = number of moles (n) ÷ volume (V)

    Firstly, we convert 18.5 grams of NaCl to moles using the formula; mole = mass/molar mass

    molar mass of NaCl = 23 + 35.5 = 58.5g/mol

    mole = 18.5/58.5

    mole = 0.32moles

    Volume of water (V) = 450mL = 450/1000 = 0.450L

    Molarity = n/V

    Molarity = 0.32/0.450

    Molarity = 0.702M

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