lake's sediment contains both copper(Il) hydroxide and chromium(Ill) hydroxide solids, which are in equilibrium

with the lake water. Acid rain falls on the lake and changes the lake's pH to 6.78. Determine the molar solubilities

of both salts under these new conditions. Which potentially toxic metal ion will pose the greatest threat due to

the acid rain falling? Assume both metals have the same toxicity, so that how toxic a metal will be is dependent

just on the ion's concentration. (4 pts)