Do you know a common everyday chemical reaction that has an ion as a resultant?

Question

The reaction must be a burning in air or a combustion in air or water

Answer 1

Burning is the combination with oxygen.

2Mg + O2--->2MgO

When a salt is dissolved in water, the ions are separate.

NaCl+ H2O--->Na+ + Cl- in H2O

Answer 2

Check the electronegativities.  I wouldn't classify Fe2O3 as ionic. An iron-oxygen bond is only about 50 percent ionic (and 50 percent covalent)

You won't get a single ion as a product of any chemical reaction since reactions preserve charge balance as well as mass balance.  But it is possible to get lots of processes where two ions, one positive and one negative, are formed.  It's even possible to get two ions from a compound that isn't remotely ionic.

Dissolve HCl gas in water to get H+ and Cl-.  The H-Cl bond is clearly covalent.  Yet the compound dissociates in water to make two ions.  

This shows us that a compound does not have to have predominately  ionic bonds to produce ions in solution..  Ditto for H2SO4, and many other compounds.

Combustion reactions usually produce oxides and only a few oxides (the alkali metals and alkaline earth metals) react with water to make alkaline (presence of OH- ion) solutions.

Na2O(s) + H2O --> 2Na+ + 2OH-

Answer 3

There is no ion - whether it is positive or negative- exists freely, it must be accompanied by a counter ion of opposite charge forming a compound.

So in your case, u can use any reaction.

for example: Fe3 + 2O2 =Fe3O4(magnetite)

This reaction is done in open air.

Answer 4

Rusting produces iron(III) oxide, which is considered to be an ionic compound consisting of Fe3+ ions and O2- ions. (You cannot produce free ions through chemical reactions.)