Chapter 14, Problem 104A

Apply your knowledge of polarity and solubility topredict whether solvation is possible in each situationshown in Table 14.9. Explain your answers.

Interpretation Introduction

Interpretation:

Using knowledge of polarity and solubility the solvation of a solute in a particular solvent have to be predicted.

Concept introduction:

Solvation is the process where the solute particles are surrounded by the solvent molecules to form a solution. “Like dissolves like” rule is applied to determine whether solvation will occur in a specific solvent.

Answer to Problem 104A

1. MgCl₂(s) is dissolved in H₂O(l)
2. NH₃(l) is not dissolved in C₆H₆(l)
3. H₂(g) is not dissolved in H₂O(l)
4. I₂(l) is dissolved in Br₂(l).

Explanation of Solution

“Like dissolves like” rule is applied to determine whether solvation will occur in a specific solvent. The polar molecules like to dissolve in polar solvent and the nonpolar molecules like to dissolve in nonpolar solvent.

1. Both MgCl₂ and H₂O are polar molecule. So, MgCl₂(s) likes todissolve in H₂O(l).
2. NH₃is a polar molecule while C₆H₆ is a nonpolar solvent. So, NH₃(l) is not dissolved in C₆H₆(l)
3. H₂ is a nonpolar molecule while H₂O is a polar solvent. So, H₂(g) is not dissolved in H₂O(l)
4. Both I₂and Br₂ are nonpolar liquid. So, I₂(l) is dissolved in Br₂(l).