[Ayz]

how can I predict products from a reaction with 3 reactants.is there a criteria that can be used to simplify it.thanks in advance.

[chenbeier]

You need an example. Without knowledge what will be react you can say nothing.

[Ayz]

Isn't there a criteria that can cut across all.take single and double displacement for example they have got a criteria to determine the product.can't I get a way to determine the 3 reactants products

[Borek]

take single and double displacement for example they have got a criteria to determine the product.

Nothing stops you from applying these criteria to each pair of reactants separately.

No idea what criteria do you mean, so it is hard to comment. In general such criteria - if based on valid thermodynamics - will work for every mixture. I am afraid though when you say "criteria" you mean some set of simplified rules with limited applicability, not guaranteed to work correctly apart from some specific cases.

[Ayz]

For example can't we have a reaction with 3 ionic compounds. I once met with one but can't remember exactly where but if you have any with you we can take it for an example. So supposing we have 3 ionic compounds which two will exchange anions and why.am I being realistic or I might be  confused somehow somewhere and the reaction am alluding to can't exist.please do some digging as I do some myself.