In this experiment, you will need to prepare 250.0 mL of 0.100 M KCl(aq) solution. Determine the mass in grams of potassium chloride require

Question

In this experiment, you will need to prepare 250.0 mL of 0.100 M KCl(aq) solution. Determine the mass in grams of potassium chloride required to prepare this solution. Type your numerical answer (no units) in the box below. Even though the number of significant figures is limited to three by the inputs, please report your answer to four significant figures.

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RI SƠ 4 years 2021-08-15T23:58:45+00:00 1 Answers 25 views 1

Answers ( )

  1. phucdien
    0
    2021-08-16T00:00:11+00:00
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    Answer: The mass in grams of potassium chloride required to prepare this solution is 1.862 grams

    Explanation:

    Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

    Molarity=\frac{n\times 1000}{V_s}

    where,

    n = moles of solute

    V_s = volume of solution in ml

    moles of KCl = \frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{74.5g/mol}

    Now put all the given values in the formula of molality, we get

    0.100=\frac{x\times 1000}{74.5g/mol\times 250.0ml}

    x=1.862g

    Therefore, the mass in grams of potassium chloride required to prepare this solution is 1.862 grams

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