1.Aluminum is suspected of causing adverse ecological effects inacidified lakes. Given that the solubility product for aluminumhydroxide, Al(OH)3 is 10-32.9 , compare themolar concentration of Al3+ in a lake with a pH of 7.5versus an acidified lake with a pH of 5.5.
2.Block B rests on a smooth surface. block A is on top of bock B. If the coefficients of static and kinetic friction beween A and B are μ_s=.4 and μ_k=.3, determine the acceleration of each block if someone pushes horizontally on block A with a force a) F=60 lb and b) F=50 lb