Sulfuric Acid Absolute Gravity

[Nehebkhau]

Hi, I called up a local battery business today and they told me they'd sell me a gallon of sulfuric battery acid for $4.00. They couldn't give me an exact percent ratio of sulfuric acid but they told me the absolute gravity of it was 1.265. Could someone please tell me if there's a way to figure out the acids purity from this info? Thx in advance.

[Nehebkhau]

*Specific Gravity* not absolute, srry about that yea i kno "shutup newbie"

[kingspaz]

for fucks sake, is it REALLY that difficult to read the rules???? why didn't you post it in the water cooler where it belongs?since i'm interested in how its calculated i'll move this to the water cooler. i calculated a concentration of 31.5% so i'd be interested to know who else agrees/disagrees since i'm not at all sure if i'm right.

[vulture]

Kingspaz, you calculated it? IMHO, you can't really calculate it, because density usually isn't a linear correlation to concentration.

[DBSP]

I just had a look at the "acid table" that NBK posted a wile ago. At a specific gravity of 1,265 the cons is 29,35%.

[kingspaz]

my calculation was just a rough appoximation. i used 0.265/0.84 * 100 to arrive at my answer. since thats effectively the mass of acid extra in the solution for 1cc divided by 96% H2SO4 (assumed 100%). i don't think my 'logic' even makes sense. dam bloody maths to hell!

[vulture]

While it may not be absolutely correct, I like the reasoning behind it. :D
It was a fairly good approximation ;)

[Sparky]

I too once had this question :). Which of course means it's in the archives and you could have searched for it :mad: .
http://chemdat.merck.de/cdrl/services/labtools/en/index.html

[DBSP]

I just realised I've made a mistake while lookin at NBKs acid table I looked at the wring figures, the cons at 1,265 should be 36% by weight. Not 29,35% as I said before.

When looking at the merck acid table the density is set to 35,6% at the secific gravit of 1,265.

Sorry about that. :o