Posted by **Melba** on Tuesday, September 26, 2006 at 4:00pm.

What volume of a 0.2 N NaoH solution do you expect to use in order to titrate 25ml (sample out of 250ml) of a 0.200 N oxalic acid solution?

heeeelp!

Equation is

H2C2O4 + 2NaOH==> 2H2O + Na2C2O4

I assume that is 25.00 mL H2C2O4.

milliequivalents(meq) NaOH = meq H2C2O4

25 mL x 0.2 = ??mL x 0.200

Do you suppose 25.00 mL.

Most schools don't teach normality now, but notice how easy it is to use normality. There are no mols and then convert mols H2C2O4 to mols NaOH, then mols/L = M for NaOH. It is all done for us by using normality. Neat!!

wow...thanks DrBob, I'll try it!

The problem will come when the question does NOT provide normality but provides molarity. Then you must convert M to N yourself OR work it the long way using mols. But note that whereas mL x N = mL x N (ALWAYS, ALWAYS, ALWAYS), mL x M /=/ (is not equal) mL x M EXCEPT when you want to work a dilution problem. For a stoichiometry problem, however, mL x M = mL x M is true ONLY when the reacting ratios are 1:1 (or 2:2 or 3:3 etc).

Thanks...I didn't know that

## Answer this Question

## Related Questions

- Chemistry - 24) It was found that a 20.00 mL portion of a solution of oxalic ...
- college Chemistry - What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---&...
- Chemistry - What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---> ...
- Chemistry - 25.00 mL of a solution of oxalic acid are titrated with 0.2586 m ...
- Chem 100L - Calculate the molarity of an aqueous NaOH solution if 32.00ml of it ...
- College Chemistry - 1) A 25mL sample of the .265M HCI solution from the previous...
- Chemistry - A student did not fully mix the solution of Oxalic Acid in the ...
- chemistry, please help! - Given: 1. Mass of oxalic acid + weighing paper 2.0355g...
- Chemistry - In this experiment NaOH is standardized to find out the percent by ...
- Higher Chem - A 0.5537-g sample containing oxalic acid required 21.62 mL of 0....