   Chapter 4, Problem 50PS

Chapter
Section
Textbook Problem

If 4.00 mL of 0.0250 M CuSO4 is diluted to 10.0 mL with pure water, what is the molar concentration of copper(II) sulfate in the diluted solution?

Interpretation Introduction

Interpretation:

If 4.00mL of 0.0250M CuSO4 is diluted to 10.0mL then its molar concentration should be determined.

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 mass

• A solution containing one gram mole or 0.1 gram of solute per litre of solution is called molar solution.
• Concentrationofsubstance=Amountof substancevolumeofthesubstance
• Amountof substance=Concentrationofsubstance×volumeofthesubstance
Explanation

Amount of CuSO4 in the 4.00mL solution can be calculated as follows,

Amount of CuSO4 = CCuSO4×VCuSO4 =0.0250 mol CuSO4L×4.00×10-3L =1×10-4 mol CuSO4

1×10-4molCuSO4 is contained in the new volume of 10

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