When graphite is placed in hydrochloric acid, no significant chemical reaction occurs. This is because graphite is a form of carbon that has a stable structure consisting of layers of carbon atoms arranged in a honeycomb lattice. The nature of these bonds makes graphite relatively inert when exposed to a strong acid like hydrochloric acid.
Graphite does not react with hydrochloric acid because the bonds between the carbon atoms in graphite are strong and do not readily break down in the presence of the acid. Additionally, hydrochloric acid mainly dissociates into hydrogen ions and chloride ions in solution, neither of which have a strong enough affinity to react with graphite under normal conditions.
In summary, the lack of reactivity can be attributed to the chemical stability of the graphite structure and the nature of the reactants involved. Therefore, if you were to immerse graphite in hydrochloric acid, you would observe little to no change.