Sodium Thiosulphate

[vlclabbie]

Hi everyone,

Can anyone tell me what concentration their stock Sodium thiosulphate is & where they get it from??

Thanks,

[matchstick]

I bought my sodium thiosulfate pentahydrate at science supply australia at 500g for $11.50 only last term.You can also get it at westlab on special till this friday 15% off all chemicals.
Concerntration? do you mean molecular weight? mine m.w. is 248.18
hope that was of some help
M

[RosalieM]

You should be able to get it from wherever you buy the rest of your chemicals. It's one of those ones I don't keep a stock solution of. I just make it up to whatever concentration is required for a specific prac. I don't think it gets used very often...

[ellice]

I have a couple of bottles of 0.25M which are used in a Yr11 Chem prac Rate of Reaction. It's also good for iodine spills. Just rinse in sodium thiosulfate, then rinse again with water.
Ellice

[matchstick]

oops!
did you mean which molarity,me such a dummy
At the moment I have 0.1M and 0.002M in stock
Ive been preparing a large prac this morning and must have sniffed too many chemicals,after reading it again, of course it made sense
sorry Matchstick

[vlclabbie]

Thanks guys! I was looking & could only see solutions but soon found the solid version... much better! Cheers