Why would a chemical reaction stop?

Answer 1

Reactions stop because after time there are less reactants so the chemical reaction starts to slow down. As there are less and less reactants the chemical reaction gets slower and slower until it stops.

Answer 2

Chemical reaction stops after some time because the energy of the reaction fades away.

Answer 3

When the reaction has reached chemical equilibrium

---- http://en.wikipedia.org/wiki/Chemical_equilibrium

Answer 4

A chemical reaction stops if it runs out of reactants.

Answer 5

It stops because all the chemicals have finished reacting.

Answer 6

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