Ключевые слова: acid, alkalis, burn, chemical, chemistry, class, compound, container, corrosive, dangerous, education, elements, equipment, experiment, formula, genius, hazard, hydroxide, ideas, industrial, industry, knowledge, lab, laboratory, learn, lesson, liquid, manufacturing, material, periodic, potassium, potassium hydroxide, properties, reaction, research, risk, sample, school, science, scientific, solution, structural, study, studying, substance, symbol, table, warning, workshop,