Ключевые слова: acid, acidic, alkaline, ammonium, analyze, base, basic, biochemistry, biology, blue, bottle, chemical, chemicals, chemistry, chlorine, control, experiment, expertise, glass, glassware, green, healthcare, hydrochloric, hydrogen, hydroxide, indicator, lab, label, laboratory, litmus, measurement, medical, medicine, nitrogen, oxygen, ph, research, school, science, solution, strip, strips, structure, technology, test, water,