I need to make 3M sulphuric acid solution from a container that says it...

DeathWish · #1 10-07-2007, 18:05

...is 95% sulphuric acid.? I need to make 3M sulphuric acid solution from a container that says it is 95% sulphuric acid. All I know is the density of sulphuric acid is 8.142g/L, and molecular weight is 98.0716g/mol. Help is highly appreciated!

DrHenry · #2 11-07-2007, 04:27

Two ways to do it. 1. 100% sulfuric acid is 18M at 96% concentration so you can work out the math.2. If you take the density and divide by the molecular weight:g/mL divided by g/mol = mol / mL x 1000 mL/L = mols/LThe problem you have is the density number is not correct or you haven't given us some unusual information. The density of 96% sulfuric aicd is 1.84 g/mL or 1840 g/L. Are you sure the number is not 1.842 g/mL?

Fly On The Wall · #3 11-07-2007, 06:06

95% sulfuric acid is approximately 18M.Cut it back 1:5 with water. Make sure you add the acid to the water, not the other way around. Go slow and let the heat evolve gradually.

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