Part A Calculate the mass percent (m/m) of a solution prepared by dissolving 57.

Question

Part A

Calculate the mass percent (m/m) of a solution prepared by dissolving 57.27 g of NaCl in 158.6 g of H2O.

Express your answer to four significant figures.

Part B

Vinegar is a solution of acetic acid in water. If a 325 mL bottle of distilled vinegar contains 27.1 mL of acetic acid, what is the volume percent (v/v) of the solution?

Express your answer to three significant figures.

Part C

Calculate the mass/volume percent (m/v) of 17.5 g NaCl in 63.5 mL of solution.

Express your answer to three significant figures.

Part D

Calculate the molarity (M) of 154.2 g of H2SO4 in 1.070 L of solution.

Express your answer to four significant figures.

Explanation / Answer

A) mass 5 = (57.27 / 57.27 + 158.6) x 100

mass % = (57.27 / 215.57) x 100

mass % = 26.57

B) v/v % = (volume of solute / volume of solution) x 100

v/v % = (27.1 / 325) x 100

v/v % = 8.34

C) m/v% = (mass of solute / volume of solution) x 100

m/v % = (17.5 / 63.5) x 100

m/v% = 27.6

D) M = n / V in L

n = 154.2 / 98 = 1.57

M = 1.57 / 1.070

M = 1.467

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