Which of the following changes will decrease the solubility of Fe(OH)3(s) relative to that of pure water? (Select all that apply.) Lowering the pH to 2.00 Adding Fe(NO3)3 Adding NaCl Adding KCN Raising the pH to 12.00 Adding KOH Solution On Lowering the pH, decrease in the concentration of OH- ions, decreases the solubilty of Fe(OH)3 Adding Fe(NO3)3 will increase the concentration of Fe3+ and so increase in the solubilty Adding NaCl, nothing will happen because neither Na+ nor Cl- has to do with the equilibrium Adding KCN nothing will happen because neither K+ nor CN- has to do with the equilibrium Raising the pH to 12.00, increase in the concentration of OH- ions, increases the solubilty of Fe(OH)3 Adding KOH, will increase the concentration of OH- and so increase in the solubilty .

1. Which of the following changes will decrease the solubility of Fe(OH)3(s) relative to that of pure
water?
(Select all that apply.)
Lowering the pH to 2.00
Adding Fe(NO3)3
Adding NaCl
Adding KCN
Raising the pH to 12.00
Adding KOH
Solution
On Lowering the pH, decrease in the concentration of OH- ions, decreases the solubilty of
Fe(OH)3
Adding Fe(NO3)3 will increase the concentration of Fe3+ and so increase in the solubilty
Adding NaCl, nothing will happen because neither Na+ nor Cl- has to do with the equilibrium
Adding KCN nothing will happen because neither K+ nor CN- has to do with the equilibrium
Raising the pH to 12.00, increase in the concentration of OH- ions, increases the solubilty of
Fe(OH)3
Adding KOH, will increase the concentration of OH- and so increase in the solubilty