What are chemical reactions a result of?

Answer 1

They are the result of two or more reactants usually combining.

You can identify when a chemical reaction has occured by a change of state being physical e.g. liquid to gas.

The product may change in colour, taste, smell, temperature, size etc.

You can also tell if it starts to effervest - bubble.

There are reversible and irreversible chemical reactions. Reversible is obviously when you can change the effects e.g. you can melt and re-solidify water whereas irreversible you can't e.g. can't turn ash back into wood when burnt.

Hope that helps (;