Homework Help: Help --->Chemistry

Posted by melek on Sunday, February 26, 2012 at 12:07am.

1) Complete and balance the following chemical reactins:
2HCI(aq)+Pb(NO3)2(aq)--->
2HI(aq)+K2SO3(s)--->
Pb(NO3)2(aq)+2KCI(aq)--->
Ba(NO3)2(aq)+Na2SO4(aq)--->
K2CO3(aq)+Ba(NO3)2(aq)--->
HCI(aq)+AgNO3(aq)--->

2) How could you separate gold from a mixture of zinc and gold?

3) Using a hydrochloric acid solution, how could you determine whether a white powder was zinc sulfide or silver nitrate? Write balanced equations.

ZnS(s)+2HCI(aq)--->
AgNO3(s)+HCI(aq)--->

THANK YOU SO MUCH!!!!

Help --->Chemistry - DrBob222, Sunday, February 26, 2012 at 12:17am
No one here will do your home work for you. What do you not understand about these questions?
CHEM - TOM, Sunday, February 26, 2012 at 3:19am
2) we know that gold is the thing we want.so use a method to have reaction with zinc but not gold.
Hydrochloric acid is a good example.
then use filter and filter paper to filter the gold out

3)AgCl is insoluble in water which is white in colour.its the white precipitate
Help --->Chemistry - Charitech, Sunday, February 26, 2012 at 7:52am
PbCl2+2HNO3

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