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27 April, 22:30

A solution is made by dissolvinh 26.42g of (NH4) 2so4 in enough h2o to make 50.00ml of solution

what is the molarity of this solution?

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  1. 28 April, 01:33
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    We first need to convert grams of ammonium sulfate to moles.

    molarity = moles of solute/liters of solution

    To convert from grams to moles, we need to divide by it's molecular mass.

    26.42 g (NH₄) ₂SO₄ * (1 mole (NH₄) ₂SO₄ / 132.14 g (NH₄) ₂SO₄) = 0.1999 mole (NH₄) ₂SO₄

    0.1999 mol/0.05000L = 3.998 M

    Since there 4 significant digits in both the volume and mass, we are limited to 4 significant digits.

    Your final answer is 3.998 M (NH₄) ₂SO₄.
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