How to use solid drugs?

1. Solid: 1, powder: medicine spoon and paper slot.

Take the medicine with a medicine spoon and put it into the test tube/put the medicine into the prepared paper slot containing the medicine, put the paper slot horizontally into the test tube, then stand the test tube upright, and take out the paper slot after the medicine enters the test tube.

2, building blocks: tweezers, medicine spoon

Hold the test tube horizontally with your left hand, take the medicine with tweezers/medicine spoon, put it at the mouth of the test tube, and then slowly erect the test tube to make the medicine slowly slide to the lower end of the test tube.

Second, the liquid: 1, pouring method: directly pour the reagent from the narrow bottle into the test tube or beaker.

2, a small amount of access, you can use a rubber dropper.

Thirdly, the solid in the test tube is heated so that the mouth of the test tube inclines slightly downward, so as to prevent water from being generated when the test tube inclines upward, and the generated water vapor condenses into small water droplets and flows back to the bottom of the test tube, which is caused by the drastic temperature change of the test tube.

Heat the liquid in the test tube:

1. The test tube mouth is inclined upward by 45.

2. The test tube mouth faces the unmanned direction.

3. Preheat before central heating (to prevent cracking)

4 Clamp the test tube in 2/3 places.

5 The liquid content shall not exceed 1/3.

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