Ключевые слова: acid, alkaline, ash, chemical, chemically, chemistry, clean, compound, container, corrosion, corrosive, crystal, damage, danger, eat, education, equipment, factory, food, glass, hazard, health, healthy, industrial, industry, kitchen, lab, laboratory, material, na, powder, research, risk, salt, sample, school, science, scientific, small, sodium, solid, substance, test, treatment, white,