Slow Reaction

Slow reaction has low rate of reaction. It takes a long time for the reaction to be complete.
Examples of slow reaction :

Rusting of Iron
An iron takes a long time to react with oxygen and water to form rust(brown solid on the iron nail), which is known as hydrated iron(III) oxide, Fe₂O₃.3H₂O.

*credit to Wikipedia

Formation of stalagmites
Stalagmites are formed due to the dripping of mineralized solutions and the deposition of calcium carbonate. Normally this stalagmites formation only occurs under certain pH conditions within the underground cavern.











Ripening of fruits