Chapter 15.2, Problem 6RQ

Interpretation Introduction

Interpretation: Essential point that must be kept in mind during dilution has to be explained.

Concept introduction: Solution is mixture in which all components are uniformly distributed. Any solution has 2 substances: solute and solvent. For formation of solution compatibility between solute and solvent is required. On the basis of quantity of solute in a specified amount of solvent, solutions are called dilute or concentrated.

Dilute solutions are prepared by adding more water or solvent to a specified amount of solutions.

Answer to Problem 6RQ

Essential point that must be kept in mind during dilution is that only solvent or water is added into the solution. The quantity of solute remains intact before and after the dilution in solution.

Explanation of Solution

During dilution of any specified amount of solvent, only solvent or water is added into the solution. The quantity of solute remains intact before and after the dilution in solution. This is key to obtain desired concentration of solution through dilution. Formula for dilution is as follows:

  ${\text{M}}_1{\text{V}}_{\text{1}}={\text{M}}_2{\text{V}}_2$

Where,

  ${\text{M}}_1$ and ${\text{M}}_2$ is initial and final molarity of solution.

  ${\text{V}}_{\text{1}}$ and ${\text{V}}_2$ is initial and final volume of solution.

Conclusion

Essential point that must be kept in mind during dilution is that only solvent or water is added into the solution. The quantity of solute remains intact before and after the dilution in solution.