Asolution is 0.010 m in each of pb(no3)2, mn(no3)2, and zn(no3)2. solid naoh is added until the ph of the solution is 8.50. which of the following statements is true? salt ksp pb(oh)2 1.4 × 10–20 mn(oh)2 2.0 × 10–13 zn(oh)2 2.1 × 10–16 a. all three hydroxides will precipitate. b. no precipitate will form. c. only pb(oh)2 will precipitate. d. only mn(oh)2 will precipitate. e. only zn(oh)2 and pb(oh)2 will precipitate.

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .