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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

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

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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