The volume of the stock solution that is required to prepare one liter K 2 Cr 2 O 7 solution of 0 .150M concentration has to be found. Concept introduction: Dilution equation: Solutions of low concentrations cannot be prepared directly. In order to prepare a solution of very small concentration, a stock solution of high concentration has to be prepared and the stock solution is diluted to smaller concentrations. A solution of higher concentration can be diluted into lower concentration using the equation given below. V i M i =V f M f Where, V i is the initial volume of the stock solution taken to prepare a dilute solution M i is the initial concentration of stock solution V f is the volume of the diluted solution M f is the concentration of diluted solution Mole is the mass of the substance that is having Avogadro number of particles. The number of moles of a given substance can be calculated by multiplying its volume with concentration Molar concentration or molarity is the ratio of number of moles of solute to the volume of the solution in liter.

BuyFind

General Chemistry - Standalone boo...

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

General Chemistry - Standalone boo...

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

Solutions

Chapter 4, Problem 4.111QP
Interpretation Introduction

Interpretation:

The volume of the stock solution that is required to prepare one liter K2Cr2O7 solution of 0.150M concentration has to be found.

Concept introduction:

Dilution equation: Solutions of low concentrations cannot be prepared directly.  In order to prepare a solution of very small concentration, a stock solution of high concentration has to be prepared and the stock solution is diluted to smaller concentrations.  A solution of higher concentration can be diluted into lower concentration using the equation given below.

ViMi=VfMf

Where,

Vi is the initial volume of the stock solution taken to prepare a dilute solution

Mi is the initial concentration of stock solution

Vf is the volume of the diluted solution

Mf is the concentration of diluted solution

Mole is the mass of the substance that is having Avogadro number of particles.  The number of moles of a given substance can be calculated by multiplying its volume with concentration

Molar concentration or molarity is the ratio of number of moles of solute to the volume of the solution in liter.

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