What is the symbol equation for neutralisation?

The symbol equation for neutralisation involves an acid and a base reacting to form water. In this process, hydrogen ions (H⁺) from the acid combine with hydroxide ions (OH⁻) from the base to produce water (H₂O).

The correct equation showcases this reaction clearly, indicating the combination of one hydrogen ion and one hydroxide ion to yield one molecule of water. This fundamental process is central to many chemical reactions and is key to understanding acid-base chemistry.

In contrast, the other choices do not accurately represent the neutralisation reaction. For example, while hydrogen and oxygen are involved in forming water, the equation that features oxygen ions does not capture the role of hydroxide ions in neutralisation. Similarly, the reactions involving chlorine and sodium are not related to the process of neutralisation; they describe different types of chemical interactions. This distinction emphasizes the specific nature of the neutralisation reaction and clarifies why the chosen equation is the correct one.