 # The concentrations of pollutants are often reported as parts per million (ppm). Parts per million of a solution is defined as: ppm = mass of solute mass of solution × 10 6 The U.S. Environmental Protection Agency (EPA) limit for barium in municipal drinking water is 2 ppm. a Calculate the maximum mass percentage of barium allowed in drinking water. b Calculate the molarity of a solution of barium that is 2 ppm. Assume that the density of the solution is 1.00 g/mL. c Express the concentration of barium as mg per liter. ### General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343 ### General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343

#### Solutions

Chapter
Section
Chapter 12, Problem 12.119QP
Textbook Problem

## The concentrations of pollutants are often reported as parts per million (ppm). Parts per million of a solution is defined as: ppm = mass   of   solute mass   of   solution × 10 6 The U.S. Environmental Protection Agency (EPA) limit for barium in municipal drinking water is 2 ppm. a Calculate the maximum mass percentage of barium allowed in drinking water. b Calculate the molarity of a solution of barium that is 2 ppm. Assume that the density of the solution is 1.00 g/mL. c Express the concentration of barium as mg per liter.

Expert Solution

(a)

Interpretation Introduction

Interpretation:

Given that limit for Barium in drinking water is 2 ppm , Mass percent of Barium allowed in drinking water has to be calculated.

Concept Introduction:

Mass percent is one of parameters used to express concentration of a solution.  It is expressed as,

Mass percent of a solute = mass of solutemass of solution × 100%

Parts per million (ppm) is a term used to express the concentration of an element or any other substance in a material.  It is expressed as,

ppm = mass of solutemass of solution × 106

### Explanation of Solution

Parts per million is expressed as,

ppm = mass of solutemass of solution × 106

The term mass of solutemass of solution corresponds to mass percent of the solute.   By comparing and rewriting the two expressions, 2 ppm Barium is written in mass percent as -

2 ppm = mass

Expert Solution

(b)

Interpretation Introduction

Interpretation:

Given that limit for Barium in drinking water is 2 ppm , Molarity of solution of Barium salt of 2 ppm has to be calculated given the density of solution as 1.0 g/mL.

Concept Introduction:

Mass percent is one of parameters used to express concentration of a solution.  It is expressed as,

Mass percent of a solute = mass of solutemass of solution × 100%

Parts per million (ppm) is a term used to express the concentration of an element or any other substance in a material.  It is expressed as,

ppm = mass of solutemass of solution × 106

Expert Solution

(c)

Interpretation Introduction

Interpretation:

Given that limit for Barium in drinking water is 2 ppm , the concentration of Barium has to be expressed in mg per liter.

Concept Introduction:

Mass percent is one of parameters used to express concentration of a solution.  It is expressed as,

Mass percent of a solute = mass of solutemass of solution × 100%

Parts per million (ppm) is a term used to express the concentration of an element or any other substance in a material.  It is expressed as,

ppm = mass of solutemass of solution × 106

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