March 1, 2015

Homework Help: Chemistry - DrBob222

Posted by Raj on Sunday, November 11, 2007 at 8:34pm.

Alright, I've made a list of reactions that would produce precipatations.

NaCl + Zn
CaCl2 + NaOH
CaCl2 + Zn
CaCl2 + Na2SO4
CuSO4 + NaOH
CuSO4 + Zn
NaOH + AgNO3
NaOH + Zn
BaOH2 + AgNO3
BaOH2 + Zn
BaOH2 + Na2SO4

So this way I can figure if it is NaCl, CaCl2, CuSO4, NaOH,Ba(OH)2, HCl, HNO3, H2O.

First if its blue its CuSO4.
If it isn't, then I'd take the pH and if its acidic then its either HCl or HNO3. And I don't know how to differentiate between them though.

If its basic, its NaOH and Ba(OH)2, and I can use my percipitation reactions to eliminate which one it isn't The same for my neutral salts. If its water, it will be neutral and won't react with anything.

So does this procedure work better?
And how would i tell between HNO3 and HCl?

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