Problem 28
Use the rule "like dissolves like" to predict whether each of the following should be soluble in hexane, \(\mathrm{C}_{6} \mathrm{H}_{14}, \mathrm{a}\) nonpolar hydrocarbon. (a) sodium nitrate, \(\mathrm{NaNO}_{3}\) (b) methanol, \(\mathrm{CH}_{3} \mathrm{OH}\) (c) bromine, \(\mathrm{Br}_{2}\)
Problem 30
Use intermolecular forces to explain why nonpolar solutes are insoluble in polar solvents.
Problem 31
Use intermolecular forces to explain why \(\mathrm{NaCl}\) is soluble in water.
Problem 32
Use intermolecular forces to explain why \(\mathrm{Br}_{2}\) is soluble in \(\mathrm{CCl}_{4}\).
Problem 33
Normal tap water contains a small amount of dissolved oxygen. What happens to the solubility of oxygen when the water is heated?
Problem 34
What is thermal pollution of water, how does it relate to gas solubility, and how does it affect fish?
Problem 35
Would you expect the solubility of oxygen and nitrogen at high altitudes (lower atmospheric pressure) to be greater or less than that at sea level? Explain.
Problem 36
How does the concentration of dissolved oxygen and nitrogen in the bloodstream change as a scuba diver swims to lower depths of the ocean? Explain.
Problem 37
A scuba diver who has the bends is treated by being placed in a chamber that has a high pressure of air. The air pressure in the chamber is lowered gradually. How does this treatment help the diver?
Problem 38
Why do carbonated beverages go "flat" after being opened for some time?
