Ключевые слова: abstract, acid, alkalis, blackboard, burn, chemical, chemistry, class, compound, concept, container, corrosive, dangerous, education, equipment, experiment, formula, genius, hazard, health, hydrochloric, hydrochloric acid, ideas, industrial, industry, knowledge, lab, laboratory, learn, lesson, manufacturing, properties, reaction, research, risk, sample, school, science, scientific, structural, student, study, studying, substance, symbol, teaching, workshop, write,