I will only post one question, because seeing as I get how to do it, I will know how to do the rest.
How many grams of calcium chloride (CaCl2; Molecular weight = 111 g mole-1) would you dissolve in water to make a .2 M cacl2 solution with 200ml final volume?
I don't need an answer, more of an explanation. If it was me, I would multiply .2 by 111g. This would give me the correct grams with 1L, but this is 200ml.
Also one of the questions has a mM? I have never heard of a milliMolarity..what could mM be?
Thank you very much
Answers:
CaCl2
111 g/mol
.2 mol/L
.2 L final vol
.2L x .2 mol/L x 111g/mol
cross out Ls and mols to get 4.44 g
i believe so, anyway. it's been a couple of years since i took gen chem. i'm assuming you're talking about college chem or AP chem...so hopefully you'll know how i arrived at the converted units up at the top and why those units at the bottom cross out.
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