The Vespiary

The Hive => Newbee Forum => Topic started by: fumarate on June 13, 2003, 12:25:00 AM

Title: Muriatic acid.
Post by: fumarate on June 13, 2003, 12:25:00 AM

Does muriatic acid bought from a pool supply store need to be purified before being used in a synthesis?

Title: No
Post by: hCiLdOdUeDn on June 13, 2003, 12:38:00 AM

Nope.

Title: Thank you. How about sulfuric acid?
Post by: fumarate on June 13, 2003, 01:22:00 AM

Thank you. How about sulfuric acid? It's in a clear plastic container marked "replacment battery acid". I know it contains some water, but I'm not sure how much. Thanks again.

Title: what purpose?
Post by: rudebwoy on June 13, 2003, 02:46:00 AM

What purpose for your sulfuric?

Title: Just as useable lab grade sulfuric acid, I'm...
Post by: fumarate on June 13, 2003, 03:03:00 AM

Just as useable lab grade sulfuric acid, I'm just obtaining some common precursors.

Title: You cant distill sulfuric
Post by: hCiLdOdUeDn on June 13, 2003, 03:22:00 AM

You cant distill sulfuric at normal atmospheric pressures. It will break down into SO2 gas, so the only thing you can do to purify sulfuric acid is boil off the water in it. If the sulfuric acid is not clear, its not suitable.

Title: Absolutely clear.
Post by: fumarate on June 13, 2003, 03:56:00 AM

My sulfuric acid is absolutely clear. Would you still recommend boiling off any water that may be present?

Title: 1
Post by: hCiLdOdUeDn on June 13, 2003, 05:08:00 AM

Unless you can find the specific gravity of your H2SO4 and calculate the % solution, then no its not necessary unless your reaction requires 98% H2SO4.

Title: battery acid content
Post by: Pimpo on June 13, 2003, 03:32:00 PM

Replacement battery acid is usually about 40%, but indeed the best thing is to determine the specific gravity.

Title: I imagine you obtain the gravity by weighting...
Post by: fumarate on June 13, 2003, 05:36:00 PM

I imagine you obtain the gravity by weighting your sulfuric acid, and comparing it to the known weight of pure sulfuric acid?

Title: Voila
Post by: raffike on June 13, 2003, 06:45:00 PM

Here ya go:

http://chemdat.merck.de/cdrl/services/labtools/en/table_h2so4.html (http://chemdat.merck.de/cdrl/services/labtools/en/table_h2so4.html)

EDIT:I have that table as htm file also,Rhodium,if you are interested in putting that table on your web page i can send it to you.

Title: Yes
Post by: Chromic on June 18, 2003, 05:21:00 AM

Yes, you can distill sulfuric acid at atmospheric temperatures. The temperature is QUITE high though. It won't break down into SO2.

Title: bp of sulfuric acid is around 290 and at 340...
Post by: raffike on June 18, 2003, 07:56:00 AM

bp of sulfuric acid is around 290 °C and at 340 °C at starts to decompose to SO₃ and H₂O