Chemistry

Question

What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution? Show all of the work needed to solve this problem.

1 Answer

  • Molar mass KCl = 74.5513 g/mol

    Number of moles:

    21.9 / 74.5513 => 0.293 moles

    Volume = 869 mL / 1000 => 0.869 L

    Molarity = moles / Volume

    Molarity = 0.293 / 0.869

    => 0.337 M
NEWS TODAY