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Question:

Determination of the existence of inorganic salts in the soil, in the filter, should pay attention to the matter

Determination of the existence of inorganic salts in the soil, in the filter, should pay attention to the matter

Answer:

Three by: the beaker close to the glass rod;
Two low: filter edge is lower than the edge of the funnel;
A sticker: filter paper close to the funnel wall, so that no bubbles.
Filter should pay attention to is a "paste, two low, three by".

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