从实验学化学（From the experimental chemistry）.docVIP

从实验学化学（From the experimental chemistry） The first chapter is the basic method of experimental chemistry -1-chemical experiment Remove insoluble solids in liquids by filtering a mixture of solids and liquids. (funnel, filter paper, glass rod, beaker) The vaporization is constantly stirred, and when there is a large crystal, the lamp should be turned off, the excess heat evaporates to dry, it can prevent overheating and then spray the dilute solution to concentrate or remove the solution of the solid solute, and steam it in a steaming dish hair The liquid volume of a liquid is heated by a temperature of water. The water of a thermometer is in the direction of the water Impurities (distilling flask, alcohol lamp, thermometer, condensing tube, pipette, conical bottle) Extraction solvent: the solvent in the original solution is not mutually soluble; The solubility of solute is much higher than the original solvent; Make it easy to evaporate. The solute is dissolved in a dissolute solvent In different degrees, the main instrument: a liquid funnel, which is extracted from the solution of the solute that is formed from it with another solvent The liquid from the lower part of the liquid is released from the lower end, and the upper layer from the top is poured out of the operation of the two separate liquids, which are used in conjunction with the extraction The process of washing precipitation on the filter will inject distilled water into the funnel, so that the water surface will not have sediment, and after the water flow is over, repeated operation will be repeated several times Instrument tray balance (or measuring cylinder), beaker, glass rod, volumetric flask, glue head dropper Main steps: calculate the amount of the volume (such as the liquid using the dropper) to dissolve (a small amount of water, stir, and pay attention to cooling) to remove the fluid (the volumetric flask should leak first, the glass rod) The washing liquid is transferred to the volumetric flas