Something is still wrong with this equation though. The law of conservation of mass
states that we cannot create or destroy
atoms in a chemical reaction.
Count the number of atoms of chlorine on
each side. What is wrong?
Nothing is wrong. The reaction destroyed a
chlorine atom.
The number of chlorine atoms is different. Since
we cannot create or destroy atoms something is

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: