nice review!!! gotta make sure you still have mad skillz in writing reactions. This is just a D-D reaction from last term.
note that the solubility table (table 4.1) was used to deduce that nickel (II) hydroxide is insoluble.
YES! More mad skillz review:) Remeber how to do these? We figure out how many mol of each reactant we have (use molarity x volume), and then we identify the limiting reactant by converting mol reactant A --> mol B, and vice versa.....
need 0.0600 mol KOH to consume 0.030 mol NiSO4. We don't have enough KOH, so KOH is the limiting reactant.
we started with KOH (aq), and this was the limiting reactant, so there isn't any K+ or OH- from the KOH - it's all consumed.
now, remember how to figure out how much XS reactant is left after the limiting reactant is all consumed? Here, NiSO4 is in XS; we started with
NiSO4 is a strong electrolyte, so we have 0.0200 mol Ni2+ and 0.0200 mol SO42- in our solution. in addition, we have 0.0200 mol K+ and 0.0100 mol SO42- from the soluble K2SO4. The final volume of our reaction mixture is 300 mL; we calculate concentrations....don't forget to add the two sources of sulfate ion!