Homework Help: Chem Help URGENT

Posted by Allison on Thursday, October 28, 2010 at 12:34am.

Could someone help me with these molecular formulas, i dont know what im doing wrong. For this example, i did it like this and it says its incorrect. Could you solve the the equations below your way and i match it to mines? Thank you so much

Fe (s) + Ni(NO3)2 (aq) =Fe(NO3)2 (aq) + Ni (s)

FeCl3(s) + K3PO4(aq)=
CaCl2(s) + K3PO4(aq)
FeCl3(s) + KNO3(aq)
Fe2(SO4)3 (aq) + K3PO4(aq)
CuBr2(s) + NH4OH(aq)
ZnBr2 (s) + NH4OH(aq)
CuBr2 (s) + NH4NO3(aq)
CuSO4 (s) + NH4OH(aq)
NiCl2 (s) + Na2CO3(aq)
MgCl2 (s) + Na2CO3(aq)
NiCl2 (s) + NaNO3(aq)
NiSO4 (s) + Na2CO3(aq

Chem Help URGENT - DrBob222, Thursday, October 28, 2010 at 12:51am
Your example probably wanted you to write Fe(NO3)3 and balance it.

Products for #2. FePO4 + KCl
#3 Ca3(PO4)2 + KCl
#4 No reaction.
#5. FePO4 + K2SO4
This exercise is to give you practice on predicting and balancing.
Rxns tend to take place if
a. the metal(alone) is ABOVE the ion(compound) in the activity series.
b. a ppt (insoluble) forms.
c. a gas forms
d. a weak electrolyte is formed.
Chem Help URGENT - Allison, Thursday, October 28, 2010 at 1:31am
thank you so much

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