1. Which test tube (1 or 2) initially had the most solid precipitate? Why was there moreppt. in this test tube? (Hint: Which solution initially contains more free floating \left.\mathrm{C}_{2}

\mathrm{O}_{4}{ }^{2-} \text { ions? } \ldots . \mathrm{K}_{2} \mathrm{C}_{2} \mathrm{O}_{4} \mathrm{Or} \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4} ?\right) Test tube 2 had the more solid precipitate because the dissociation of K2C2O4 is more feasible than H2C2O4 Thus in case of potassium oxalate there are more oxalate ions present than that of oxalic acid . Hence by addition of CaCl2 test tube2 would produce more precipitate.