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Precipitation reaction help?
I'm trying to complete and balance a few reaction. Then I'm suppose to circle the formula that is insoluble. I also have to write the net ionic equations. I know how to balance. I think I know the rules of solubility and how to write the net ionic equations.
my only problem is... I forgot how to complete the reactions! So my question is: What rules do I follow when completing a reaction?
Ex: NiSOsub4(aq) + KI(aq)
or
Ex: Ca(CHsub3COO)sub2(aq) + (NHsub4)sub3POsub4(aq)
Please help! I have a lot of these to do!
1 Answer
- HahahaLv 71 decade agoFavorite Answer
To complete a reaction, there must be either a precipitate, a gas releasing, a neutralization, or a redox reaction.
For NiSO4(aq) + KI(aq), nothing happens. All four ions, Ni++, SO4--, K+, and I- would co-exist in the solution.
For Ca(CH3COO)2(aq) + (NH4)3PO4(aq)
Since Ca3(PO4)2 is an precipitate, the reaction takes place:
3Ca(CH3COO)2(aq) + 2(NH4)3PO4(aq) ==> Ca3(PO4)2(s) + 6NH4(CH3COO)(aq)
