Assume 0.18 l of a 5.0 m solution of lead (ii) nitrate, pb(no3)2, reacts with a 2.6 m solution of sodium phosphate, na3po4, to produce lead (ii) phosphate, pb3(po4)2, and sodium nitrate, nano3. the problem requires that you determine the volume of sodium phosphate, na3po4, needed for the reaction to occur.

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.