The density of acetonitrile (CH3CN) is 0.786 g/mL andthe density of methanol (CH3OH) is 0.791 g/mL. A solutionis made by dissolving 22.5 mL of CH3OH in 98.7 mL ofCH3CN. (a) What is the mole fraction of methanol in thesolution? (b) What is the molality of the solution? (c) Assumingthat the volumes are additive, what is the molarityof CH3OH in the solution?
The density of acetonitrile (CH3CN) is 0.786 g/mL andthe density of methanol (CH3OH) is 0.791 g/mL. A solutionis made by dissolving 22.5 mL of CH3OH in 98.7 mL ofCH3CN. (a) What is the mole fraction of methanol in thesolution? (b) What is the molality of the solution? (c) Assumingthat the volumes are additive, what is the molarityof CH3OH in the solution?
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter13: Solutions And Their Behavior
Section: Chapter Questions
Problem 7PS
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The density of acetonitrile (CH3CN) is 0.786 g/mL and
the density of methanol (CH3OH) is 0.791 g/mL. A solution
is made by dissolving 22.5 mL of CH3OH in 98.7 mL of
CH3CN. (a) What is the mole fraction of methanol in the
solution? (b) What is the molality of the solution? (c) Assuming
that the volumes are additive, what is the molarity
of CH3OH in the solution?
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