Chapter 9, Problem 9.77UTC

Interpretation Introduction

To Determine: The correct diagram that matches the given statements

Answer to Problem 9.77UTC

Solution:

a) Diagram 1

b) Diagram 2

c) Diagram 1

Explanation of Solution

“Like dissolves like”. In other words, a polar solute will dissolve in a polar solvent. And, a non-polar solute will dissolve in a non-polar solvent.

1. Given: a polar solute and a polar solvent

Diagram 1 depicts this scenario. Here both solute and solvent have the same nature i.e. they are polar. In diagram 1, the pink and blue balls are uniformly dispersed indicating that they mix with each other or can be dissolved.

2. Given: a non-polar solute and a polar solvent

Diagram 2 depicts this scenario. Here the solute is non-polar while the solvent is polar. Since the two are different, they will not mix and tend to separate out into two layers like the orange and blue balls shown in diagram 2.

3. Given: a non-polar solute and a non-polar solvent

Diagram 1 depicts this scenario. Here both solute and solvent have the same nature i.e. they are non-polar. Again as shown in diagram 1, the pink and blue balls are uniformly dispersed indicating that they mix with each other or can be dissolved.

Conclusion

Diagram 1 depicts a solution containing a polar solute and polar solvent

Diagram 2 depicts a solution containing a non-polar solute and polar solvent

Diagram 1 depicts a solution containing a non-polar solute and non-polar solvent