Molarity, Mole fractions and MolalityNameo the following problems, show all your work. If you only give an answer you will lose half of youroints.1. How many grams of potassium carbonate are needed to make 200 ml of a 2.5 M solution?2. How many liters of a 3.5 M solution can be made using 75 grams of lithium bromide?3. What is the concentration of an aqueous solution with a volume of 500 ml that contains 250grams of iron (II) chloride?4. How many grams of ammonium sulfate are needed to make a 0.5 L solution at a concentrationof 5M?5. A solution is prepared by mixing 75 g of water, H;0 and 85 g of ethanol C,H;OH. Determine themole fraction of each substance.

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How many grams of potassium carbonate are needed to make 200 ml of a 2.5 M solution?

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 62A

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

Molarity, Mole fractions and Molality
Name
o the following problems, show all your work. If you only give an answer you will lose half of your
oints.
1. How many grams of potassium carbonate are needed to make 200 ml of a 2.5 M solution?
2. How many liters of a 3.5 M solution can be made using 75 grams of lithium bromide?
3. What is the concentration of an aqueous solution with a volume of 500 ml that contains 250
grams of iron (II) chloride?
4. How many grams of ammonium sulfate are needed to make a 0.5 L solution at a concentration
of 5M?
5. A solution is prepared by mixing 75 g of water, H;0 and 85 g of ethanol C,H;OH. Determine the
mole fraction of each substance.

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