sodium citrate vs sodium citrate 2 hydrate

[robska]

I want to use sodium citrate for salt prints, but what I got is sodium citrate 2 hydrate. (http://www.alternativephotography.com/wp/processes/saltprints/a-dash-of-salt)

Can I use it, and if yes, should I somehow convert the quantity?


Thank you and best regards,


Robert

 

[sfaber17]

Yes, you can use it. It could be that the formula really meant di-hydrate, but if it meant anhydrous, you can figure the molecular weight of the tri-sodium citrate is 258. The weight of 2 waters is 36. So the ratio of the hydrated to anhydrous is 294/258 = 1.14.
So use 1.14 times more of your hydrated form. It most likely won't make much difference.

 

[robska]

Thank you very much!