   # How many milligrams of nitrate are present in 185 L of water with a nitrate concentration of 15 mg/L? ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

#### Solutions

Chapter
Section ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 12, Problem 12.9YT
Textbook Problem
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## How many milligrams of nitrate are present in 185 L of water with a nitrate concentration of 15 mg/L?

Interpretation Introduction

Interpretation:

The milligrams of nitrate present in 185 L of water with given concentration of nitrate is to be calculated.

Concept Introduction:

Molarity is defined as the number of moles of solute per liter of solution. Mathematically, molarity (M) is calculated as:

Molarity(M)=Moles soluteLiters solution

The volume of solution should be in liters and the unit of molarity is M.

The relation between the numbers of moles (n) and molar mass is: n=mmolar mass

Here, m is mass.

The concentration of a solution in milligrams per liter is the ratio of milligram solute to liter solution.

The concentration of a solution in milligrams per liter is expressed as:

mg/L=milligram solutelitres solution

### Explanation of Solution

The concentration of nitrate solution is calculated as;

mg/LConcentration of nitrate=milligram of nitratelitres nitrate solution

Rearrange the above expression for milligram of nitrate as:

milligram of nitrate=(mg/LConcentration of nitrate)(litres nitrate solution)

Substitute 185 L for litres nitrate&

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