Explanation Molarity: The number of moles of solute per liter of solution is known as molarity of the solution. It symbolized by M . Molarity of any solution is a ratio of moles of solutes per liter of solution. It is expressed by the following formula: Molarity ( M ) = moles of solutes liter of solution Density: The density of a substance is equal to the ratio of its mass and volume. In general we can say the density of a substance is mass per unit volume. density ( g cm 3 ) = mass (g) volume (cm 3 ) or mass (g) volume (mL) Mass percentage: Mass percentage is concentration expression of solute which may be percentage of the mass of the solution. It expressed by the following formula: Mass percentage of solute = grams of solute grams of solution × 100 % The concentration and the volume of dilute and concentrated solution are given as follows: C 1 V 1 = C 2 V 2 Concentrated solution Dilute solution a. Given: The mass of evaporating dish is 24.10 g and the mass of evaporating dish with NaCl is 25.50 g. Calculation: First calculate the mass of NaCl as follows: Mass of NaCl = 25 .50 g − 24 .10 g = 1 .4 g If assume that the density of the solution is same as water then the mass of solution is 10 g. Now calculate the mass percentage of the solution as follows: Mass percentage of solute = grams of solute grams of solution × 100 % Mass percentage of NaCl = 1 .4 grams 10 .0 grams of solution × 100 % = 14 % b. Given: The mass of evaporating dish is 24.10 g and the mass of evaporating dish with NaCl is 25.50 g. Calculation: First calculate the mass of NaCl as follows: Mass of NaCl = 25 .50 g − 24 .10 g = 1 .4 g Calculate the number of moles of salt by its molar mass: Molar mass of NaCl = 58

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Books a la Carte Edition & Modified MasteringChemistry with Pearson eText -- ValuePack Access Card Package

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ISBN: 9780133899573

Author: Karen C. Timberlake

Publisher: PEARSON

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Chapter 9, Problem 9.105CQ

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To determine:

The mass percentage of the NaCl solution

The molarity of the NaCl solution

The molarity of the diluted NaCl solution

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Chapter 9, Problem 9.104AQAP

Chapter 9, Problem 9.106CQ

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Chemistry: An Introduction to General, Organic, and Biological Chemistry, Books a la Carte Edition & Modified MasteringChemistry with Pearson eText -- ValuePack Access Card Package

Ch. 9.1 - Prob. 9.1QAP Ch. 9.1 - Prob. 9.2QAP Ch. 9.1 - Describe the formation of an aqueous KI solution,...Ch. 9.1 - Describe the formation of an aqueous LiBr...Ch. 9.1 - Prob. 9.5QAP Ch. 9.1 - Prob. 9.6QAP Ch. 9.2 - Prob. 9.7QAP Ch. 9.2 - NaOHis a strong electrolyte, and CH3OH is a...Ch. 9.2 - Write a balanced equation for the dissociation of...Ch. 9.2 - Write the balanced equation for the dissociation...

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The mass percentage of the NaCl solution The molarity of the NaCl solution The molarity of the diluted NaCl solution

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To determine: The mass percentage of the NaCl solution The molarity of the NaCl solution The molarity of the diluted NaCl solution

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Chapter 9 Solutions

To determine:

The mass percentage of the NaCl solution

The molarity of the NaCl solution

The molarity of the diluted NaCl solution