What kind of reaction is this (redox, precipitation, acid-base, or complex ion formation reaction)?

1. 3 Ca(s) + 2 Al^3+(aq) -> 3 Ca^2+(aq) + 2 Al(s)

2. LiHCO3(s) + heat -> Li2CO3(s) + CO2(g) + H2O(g)

Complete the reaction: Ni(s) + 2 Na^+(aq) -> ?

3 answers

First you must recognize that you can't crumple these things up and place them in a one box fits all. Some reactions may be more than one type.
2Na + 2H2O ==> H2 + 2NaOH
This is a redox rxn, a single replacement, and by some schemes even an acid/base rxn.

1. redox
2. decomposition
3. no reaction.
Thanks, but for the first one, I thought it'd be no reaction since they are both metals. Is it possible for Ca and Al to react with each other?
No but it isn't Ca and Al. Note it is Ca and Al^3+ ION
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