posted by Sean .
H2C2O4.2H2O(s) is primary standard substance. 2.3688g of oxalic acid hydrate were completely neutralized by 42.56ml of NaOH solution. Calculate the molar concentration of the NaOH solution. Write the balanced equation for the reaction.
H2C2O4.H2O + 2NaOH ==> Na2C2O4 + 3H2O
mols H2C2O4.H2O = grams/molar mass
mols NaOH = twice that (look at the coefficients in the balanced equation).
Then M NaOH = mols NaOH/L NaOH.