Ключевые слова: acid, acidity, agent, alkaline, antacid, baking, bicarb, bicarbonate, blackboard, carbonate, chalkboard, chemical, cleaner, cleaning, compound, copy space, detergent, eco, environmentally, friendly, heartburn, hydrogen, hygiene, indigestion, ingredient, jar, medicine, natural, neutralizer, nontoxic, powder, salt, soda, sodium, spoon, spoonful, studio, top view,