How to make 50mL of 5% Potassium Dichromate solution?

I'm having a bit of trouble figuring out how to make a 5% solution of potassium dichromate solution to use for contrast control in pt/pd. I started with calculating the molar weights for water and potassium dichromate, (18.01528 and 294.1846). And now my brain has shut down.

Can I just add 2.5g of Potassium dichromate to 50mL of water? For some reason, I'm thinking because of the difference in molar weights I can't think of it like that... but now (a second after writing that) I think I can. Anyways, confused...thanks in advance Adv Reply Reply With Quote 06-08-2006 10:51 PM #2 smieglitz Join Date Oct 2002 Location Kalamazoo, Michigan, USA Shooter Large Format Posts 1,621 Images 91 Actually, I think it should be 2.5gm plus 47.5ml water to get a 5% solution since that should weigh 50gm total.

Originally Posted by guruguhan ...I started with calculating the molar weights for water and potassium dichromate, (18.01528 and 294.1846)....in molar weights I can't think of it like that. ... more.

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