The method of sodium salt bromide and ammonium precipitation
In the past, those who are good at studying things want to obtain the precipitation of sodium acetate and ammonium bromide. Take an appropriate amount of acetic acid solution and slowly inject it into the sodium-containing agent. The two phase combine, and the liquid gradually changes slightly.

Take the brominated agent again, and mix it with the ammonium-based liquid in an exquisite way. Stir well, and the liquid color is clear.

Then, mix the liquid containing sodium acetate with the liquid containing ammonium bromide. At first, the liquid is still calm, but after a while, the micro-blue gradually rises, and something precipitates from the liquid, like fine-grained dust, slowly settling. This is the precipitation formed by sodium acetate and ammonium bromide.

At that time, those who study things observe their colors, examine their shapes, and record the changes in detail. Polyphony various conditions, such as temperature, such as the thickness of the agent, observe the differences in precipitation, in order to study the subtle principles, hoping to be able to understand the law of its synthesis, for future use.