Which of the following sets of solute and solvents will make a homogeneous solution? (naphthalene is a non-polar organic molecule)

1. Water and benzene

2. Benzene and ammonium nitrate

3. Benzene and naphthalene

4. Water and naphthalene

Like dissolves like.

Benzene is non-polar.
Naphthalene is non-polar.

To determine which sets of solute and solvents will make a homogeneous solution, we need to consider the nature of the solutes and solvents.

A homogeneous solution is one in which the solute particles are evenly distributed throughout the solvent, resulting in a uniform mixture. For a solution to be homogeneous, the solute and solvent should have similar intermolecular forces.

Let's analyze each option:

1. Water and benzene: Water is a polar solvent, while benzene is a non-polar solvent. Polar solvents like water tend to dissolve polar solutes, while non-polar solvents like benzene dissolve non-polar solutes. Since water and benzene have different polarities, they are unlikely to form a homogeneous solution.

2. Benzene and ammonium nitrate: Benzene is a non-polar solvent, while ammonium nitrate is a polar solute. Similar to option 1, benzene and ammonium nitrate have different polarities, making it unlikely for them to form a homogeneous solution.

3. Benzene and naphthalene: Both benzene and naphthalene are non-polar solvents. Since they have similar intermolecular forces, they are likely to have good solubility in each other. Therefore, benzene and naphthalene are expected to form a homogeneous solution.

4. Water and naphthalene: Water is a polar solvent, while naphthalene is a non-polar solute. As mentioned before, polar solvents tend to dissolve polar solutes. Since water and naphthalene have different polarities, they are unlikely to form a homogeneous solution.

Based on this analysis, option 3 (benzene and naphthalene) is the only pair that is likely to form a homogeneous solution.