   # What mass of oxalic acid, H 2 C 2 O 4 , is required to prepare 250. mL of a solution that has a concentration of 0.15 M H 2 C 2 O 4 ? ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 4, Problem 48PS
Textbook Problem
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## What mass of oxalic acid, H2C2O4, is required to prepare 250. mL of a solution that has a concentration of 0.15 M H2C2O4?

Interpretation Introduction

Interpretation:

It should be determined that the mass of oxalic acid H2C2O4 required to prepare 250mL of a solution that has a concentration of  0.15M H2C2O4.

Concept introduction:

• Concentration of solutions can be expressed in various terms; molarity is one such concentration expressing term.
• Molarity (M) of a solution is the number of gram moles of a solute present in one liter of the solution.

Molarity=MassperlitreMolecular massMolarity=W×1000m×V

Where W, V and m are the mass of solute, volume of solution and molar mass of the solute respectively.

W=m×V×M1000

• A solution containing one gram mole or 0.1 gram of solute per litre of solution is called molar solution.

### Explanation of Solution

The mass of H2C2O4 required to make 250mL of 0.15M solution can be calculated as follows,

W =m×V×M1000W =90.03g/mol×250mL×0

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