Chemical Equation

2.4

Chemical Equation

The chemical equation represents the chemical reaction.
The reactants will always be written on the left-hand side and the product on the right-hand side.
The following diagram is the steps in determining the chemical equation.

Below shows an example of a chemical equation:
- \(Mg(s) + 2HCl(aq) \rightarrow MgCl_2(aq) + H_2(g)\)
- *note: (s) solid state, (aq) aqueous state and (g) gas state.
From the chemical equation above, we know, solid magnesium and HCl are the reactants.
These two reactants react and become magnesium chloride.
For better understanding, pay attention to the coefficient for each reactant and product in the chemical equation.
- One mole of magnesium reacts with 2 moles of hydrochloric acid to produce 1 mole of magnesium chloride and 1 mole of hydrogen gas.