It all depends on the chemical reaction. Some of them need catalysts or heat. Others just require that you put the two chemicals together, or mix them into water.
An enzyme is not required in a chemical reaction. While reactants, energy, and a chemical reaction pathway are essential components of a chemical reaction, enzymes can speed up the reaction but are not always necessary for it to occur.
An acid and a base
Heat energy is necessary for some chemical reactions to occur. Some chemical reactions are endothermic meaning they require or absorb energy for a chemical reaction to occur. Other chemical reaction are exothermic meaning they release energy when the chemical reaction takes place..
i dont know either...
If a chemical reaction does not occur it means that the reactants are not changing their initial forms. This is often the result of the reactants solubility or lack there of, charges, and state.
Chemical changes occur after a chemical reaction.
Heat?
The amount of energy necessary to cause a chemical reaction to occur is called activation energy.
This is a sign of a chemical reaction.
Any reaction occur.
In the chemical installations of the plant.
with both proper energy and proper oreantation