[jesse.counter]

I have two questions on a lab due tomorrow if someone could provide some help that would be great

2.A 0.546 g sample of pure H2C2O4 ? 2H2O crystals is dissolved in water and titrated with 22.40 mL of a potassium hydroxide solution. What is the molarity of the KOH (aq)? Show your work.

4.An empty flask is found to have a mass of 97.34 grams. A sample of vinegar is added to the flask and the total mass is measured at 119.22 grams. A 5.023 gram sample of tartaric acid dehydrate is dissolved in water and diluted to 250 mL in a volumetric flask. A 34.2 mL portion of this tartaric acid solution reacts completely with 28.3 mL of a sodium hydroxide solution. The vinegar sample requires 40.1 mL of this same sodium hydroxide solution for complete reaction. Calculate the percent (w/w) of acetic acid in the vinegar.

Thanks, Jesse

[mike]

Ummmm... have you tried these yourself?

[jesse.counter]

Yes, the first one i am assuming would involve C1V1 = c2V2 but it only give you 2 pieces of data and im stuck on 4 at the moment

[mike]

Well I don't know what H2C2O4 is but I assume it is some sort of acid to react with KOH.

So first you need to write a balanced equation for the reactionof the acid with KOH.

[Borek]

Well I don't know what H2C2O4 is but I assume it is some sort of acid to react with KOH.

Oxalic.

[mike]

Oxalic.

Haha, of course