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.

All three hydroxides will precipitate

Explanation:

General solubility equilibrium of bivalent metal hydroxides is represented as-

solubility product,

If , at pH 8.50, product of and exceeds values of given hydroxides then hydroxides of given metal ions will precipitate.

pH = 8.50

or, pOH = 14-8.50 = 5.50

or, = 5.50

or, =

or, =

As each salt solutions have concentration of 0.010 M therefore concentrations of each metal ions () are 0.010 M

So,

As product of and exceeds values of every hydroxides therefore all three hydroxides will precipitate.

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explanation:

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