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12 February, 07:13

How many grams of sodium chloride

(NaCl) are required to dissolve in

534 g of water to make a 0.875 m

solution?

+1
Answers (1)
  1. 12 February, 08:13
    0
    Mass = 27.291 g

    Explanation:

    Given dа ta:

    Mass of sodium chloride = ?

    Mass of water = 534 g

    Molality = 0.875 m

    Solution:

    Molality:

    It is the number of moles of solute into kilogram of solvent.

    Formula:

    Molality = number of moles of solute / kilogram solvent

    Mathematical expression:

    m = n/kg

    Now we will convert the g into kg.

    Mass of water = 534 g * 1kg/1000 g = 0.534 kg

    Now we will put the values in formula.

    0.875 m = n / 0.534 kg

    n = 0.467 mol

    Now we will calculate the mass of sodium chloride:

    Mass = number of moles * molar mass

    Mass = 0.467 mol * 58.44 g/mol

    Mass = 27.291 g
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