Ключевые слова: acid, background, base, berzelius, biochemistry, biology, bottle, career, chemical, chemistry, class, colorless, constituent, didactic, disease, doctor, drug, educational, engineer, experiment, floating, glassware, green, hazardous, ingredient, label, laboratory, learn, liquid, medical, mixing, modify, observation, pharmacist, pharmacology, research, result, sample, sanitary, science, scientist, specimen, student, study, substances, test, testing, transparent, unhealthy, white,