Solution Preparation Of Pure Acetic Acid
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Solution Preparation Of Pure Acetic Acid

Solutions are homogeneous mixtures. Solutions consist of solutes and solvents (the more voluminous substance into which the solute dissolves). Solution concentration measures the amount of solute per liter of the solvent. Molarity is a commonly used measure of solution concentration.

Pure acetic acid (HC2H3O2), also known as glacier acetic acid, is a liquid with density 1.049 g/mL at 25oC. Calculate the molarity of a solution of acetic acid made by dissolving 20 mL of glacier acetic acid at 25oC in enough water to make 250 mL.

The strings: S7P1A15 (containership - mass).

The math:
Pj Problem of Interest is of type containership (mass).

Mass of 20 mL of HC2H3O2 = 1.049 x 20 = 20.98 g
Molar mass of HC2H3O2 = 24 + 4 + 32 = 60 g
So, mol in 20 mL of HC2H3O2 = 20.98/60 = 0.3496 mol.
0.3496 mol in 0.250 L
So, 0.3496/0.250 = 1.398 moles in 1 L = 1.398 M.

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