The pH of a base solution is 12.699. The amount of crystalline oxalic acid required to react with 2 lit of this base solution is (assume oxalic acid dissoiates completely)

POH = 14 -12.699 = 1.3⇒ [OH-] = 5 x10-2Equivalents of H2C2O4 = Equivalents of baseCrystalline oxalic acid has the following formula : H2C2O4. 2H2O ;WaGEW of acid=VaNa; Wa63=2×5×10-2; Wa=6.3 g ;