NH ₃- NH ₄CI

NH₃-NH₄CI is a mixture of ammonia (NH₃) and ammonium chloride (NH₄CI). It is commonly used in the laboratory as a buffer solution to control the pH of a solution. The ammonia acts as a weak base, while the ammonium chloride acts as a weak acid. This buffer solution is often used in biology and biochemistry experiments to maintain a constant pH environment for enzymes and other biomolecules. It is also used in fertilizers, as ammonium is an important source of nitrogen for plant growth.