Question

1 true or false 1 point pentane, a nonpolar covalent compound, is insoluble in water. true false 2 multiple choice 1 point which solute would you expect to be insoluble in water? recall, water is polar. methane (nonpolar) ethanol (polar) ammonia (polar) methanol (polar) 3 true or false 1 point the solubility of a solid increases as the solution is cooled. true false

Explanation:

Question 1

The principle "like dissolves like" states that polar substances dissolve in polar solvents and nonpolar substances dissolve in nonpolar solvents. Water is polar, and pentane is nonpolar, so pentane should be insoluble in water.

Using the "like dissolves like" rule, water (polar) dissolves polar solutes. Methane is nonpolar, while ethanol, ammonia, and methanol are polar. So methane should be insoluble in water.

For most solid solutes, solubility in a liquid (like water) generally increases with increasing temperature and decreases with decreasing temperature (cooling). So the statement is false.

Answer:

True

Question 2