"Removal of Insoluble Impurities in Coarse Salt" Salt Fertilizer PPT Courseware 2

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"Removal of Insoluble Impurities in Coarse Salt" Salt Fertilizer PPT Courseware 2

Removal of insoluble impurities in coarse salt

1. Dissolve 2. Filter 3. Evaporate

Remove insoluble impurities from coarse salt

When filtering, you should pay attention to: "One post, two low, three rely"

4. Yield: refined salt/coarse salt×100%

1.dissolve

①Instruments: beaker, glass rod

②The role of the glass rod: speed up the dissolution rate of coarse salt

2.Filter

①Instruments: Iron stand with iron ring, funnel, beaker, filter paper, glass rod

②The function of glass rod: drainage

③Note: One stick, two low, three lean

2.Filter

First post: 1. The filter paper sticks to the inner wall of the funnel.

Second low: 1. The edge of the filter paper is lower than the edge of the funnel.

2. The edge of the filtrate is lower than the edge of the filter paper.

Three leanings: 1. The mouth of the beaker is close to the glass rod.

2. The glass rod is close to the three layers of filter paper.

3. The tip of the funnel is close to the inner wall of the beaker.

3. Evaporate

①Instruments: iron stand with iron ring, evaporating dish, alcohol lamp, glass rod

②The role of the glass rod: to prevent liquid droplets from splashing due to uneven heating

③Note: Stop heating when more solids appear in the evaporating dish

4. Calculate yield

① Use a glass rod to transfer the solid salt to paper and weigh it to calculate the yield.

②The role of the glass rod: transfer solids

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Update Time: 2024-10-03

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 2 industry PPT template

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