The equation 2HCl -> H2 + Cl2

The above chemical equation represents the decomposition process of hydrochloric acid (HCl), one of the strongest acids, into hydrogen (H₂) and chlorine (Cl₂). On each side of the equation, we have 2 moles of HCl producing 1 mole of H₂ and 1 mole of Cl₂.

Reaction conditions: This reaction usually takes place under the influence of heat or light.

Reaction process: During the reaction, two HCl molecules will bond together, then separate into two hydrogen atoms that bond together to form hydrogen gas and two chlorine atoms that bond together to form chlorine gas.

Phenomenon occurrence: When the reaction takes place, you will see the formation of hydrogen gas and chlorine gas. This phenomenon can be recognized by observing gas bubbles from the HCl solution.