Acdy酸性(and Ammonia solutionn basicity碱性)can be scaled by pH value Sodium bicarbonate solution mp pH=-log[ H3O* Neutrality p Lemon juice Pickled ume (Japanese apricot) Gastric juices Difficult living conditions Hydrochloric acid and sulfuric acidAcidity 酸性 (and basicity 碱性) can be scaled by pH value pH = -log[H3O+ ]