Question

How do you find the molarity(M) of NaOH in this reaction:

2NaOH(aq) + H2C2O4-H2O > Na2C2O4(aq) + 2H2O

The only given information is 0.2079g of H2C2O4-2H2O

Answer 1

This problem can not be solved without the volume of NaOH used in the titration.
0.2079 g/molar mass H2C2O4.H2O = moles H2X2O4.H2O (note: you typed H2O one place and 2H2O another).
From the equation, moles NaOH = twice the moles of the oxalate.
Then MNaOH = moles NaOH/L NaOH.

Answer 2

Hydrochloric acid is sold as a concentrated acqueous solution.
If the molarity of HCl is 12.0 and its density is 1.18 g/ml. calculate
A) MOLALITY
B)THE % BY MASS OF HCl in the solution

Answer 3

See you post above and the response by Bob Pursley. It isn't a good idea to piggy-back your post onto that of another.