[Calvin_ledvaky]

How I can concentrating the following acids

1. 25% 4M Sulfuric Acid (Battery acid) into a 98% 18M
2. 5% Acetic acid (Vinegar) to (glacial) 98% acetic acid

[AWK]

Though concentration of both acids is possible from theoretic point of view there is a little chance that after a huge effort you will obtain a concentration of ~ 90 %.
Search google
... and be extremely careful with experiments.

[hobobot]

In this thread: http://www.chemicalforums.com/index.php?topic=40777.0
We talked about just using drain opener as a source of Sulfuric Acid.  I've been using it for a while. Works pretty good.

As far as glacial acetic acid goes...I'm not sure. I might try to go about it indirectly.
If you had a distiller you could easily make 95% ethanol, then oxidize it to make your acetic acid.
Never tried it, though.

[Calvin_ledvaky]

Can I boil down Sulfuric acid to increase its Concertration.

[hobobot]

Can I boil down Sulfuric acid to increase its Concertration.

Yes. But, you will make some SO2 gas. So get a good fume hood or do it outside. Definitely something you don't want to breathe.

[Calvin_ledvaky]

How can I make an acetic acid ?

[hobobot]

How can I make an acetic acid ?

This--->

As far as glacial acetic acid goes...I'm not sure. I might try to go about it indirectly.
If you had a distiller you could easily make 95% ethanol, then oxidize it to make your acetic acid.
Never tried it, though.

Also This --->

Search google

And...how much chemistry experience do you have? Are you just making sulfuric acid and acetic acid for the heck of it, or do you have other plans?

[408]

Sulfuric boil down as previously stated.

Acetic: react with bicarbonate to get sodium acetate.  Evaporate to dryness.  Dry in an oven. Put it in your oven at around 80-90C to turn the trihydrate into the anhydrous...it smells like baking bread for whatever reason.  Mix with concentrated sulfuric acid and distill, collecting the fraction from 115-120C.  And bingo, glacial acetic acid.  Harmless compared to the vapours you will encounter boiling down concentrated sulfuric...