   # Calculate the molarity of each of these solutions. a. A 5.623-g sample of NaHCO 3 is dissolved in enough water to make 250.0 mL of solution. b. A 184.6-mg sample of K 2 Cr 2 O 7 is dissolved in enough water to make 500.0 mL of solution. c. A 0.1025-g sample of copper metal is dissolved in 35 Ml of concentrated HNO 3 to form Cu 2+ ions and then water is added to make a total volume of 200.0 mL. (Calculate the molarity of Cu 2+ .) ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 6, Problem 29E
Textbook Problem
238 views

## Calculate the molarity of each of these solutions.a. A 5.623-g sample of NaHCO3 is dissolved in enough water to make 250.0 mL of solution.b. A 184.6-mg sample of K2Cr2O7 is dissolved in enough water to make 500.0 mL of solution.c. A 0.1025-g sample of copper metal is dissolved in 35 Ml of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 200.0 mL. (Calculate the molarity of Cu2+.)

(a)

Interpretation Introduction

Interpretation: To calculate the molarity of each of these solutions.

5.623-g sample of NaHCO3 is dissolved in enough water to make 250 ml of solution

Concept Introduction:

Concentration can be defined in terms of molarity as moles of solute per volume of solution in litres. It can be given by the expression,

Weight=volume×molarity×molecularweight1000

### Explanation of Solution

Calculate the molarity of NaHCO3 solution

Given info:

250ml, NaHCO3=5.623g

Let as consider X=molarity

Molecular weight NaHCO3 is: 84

Wt=volume×molari

(b)

Interpretation Introduction

Interpretation: To calculate the molarity of each of these solutions.

184.6-mg sample of K2Cr2O7 is dissolved in enough water to make 500ml of solution

Concept Introduction:

Concentration can be defined in terms of molarity as moles of solute per volume of solution in litres. It can be given by the expression,

Weight=volume×molarity×molecularweight1000

(c)

Interpretation Introduction

Interpretation: To calculate the molarity of each of these solutions.

0.1025-g sample of copper metal is dissolved in 35 ml of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 200ml

Concept Introduction:

Concentration can be defined in terms of molarity as moles of solute per volume of solution in litres. It can be given by the expression,

Weight=volume×molarity×molecularweight1000

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