9
AssignmentMultiple Select

Measures of Concentration: Molality and Other Calculations

Question 9 • *25-26 KCS18 Chemistry IC

Which of the following combinations of information would allow you to calculate concentration in ppmv? Check all that apply.

Answer
A
moles of solute and mass of solution
B
moles of solute, mass of solution, and density of solution
C
mass of solute, density of solute, and volume of solution
D
volume of solute, mass of solution, and density of solution

Explanation

ppmv is calculated as (volume of solute ÷ volume of solution) × 1,000,000. In C, the solute’s volume can be found from its mass and density, and the solution volume is given. In D, the solute volume is given, while the solution volume can be found from its mass and density. Moles alone do not provide the solute’s volume, so A and B are insufficient.

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