The operation of the device for producing gases – the Kipp apparatus – is based on the contact of substances – the condition of a chemical reaction.
The principle of operation of the Kipp apparatus (named after its creator, the Dutch pharmacist Peter Jakob Kipp) will be considered using the example of hydrogen production. Zinc granules are placed on the grate located at the bottom of the middle tank. A solution of hydrochloric acid is poured into the apparatus. When the valve on the flue pipe is closed, the acid is in the upper funnel and the lower reservoir. As soon as the tap is opened, acid flows from the funnel and fills the lower part of the second reservoir, as a result, a reaction with zinc begins, hydrogen is released. When the experiment is over, the valve is closed and hydrogen stops coming out of the Kipp apparatus. The gas pressure forces the acid into the funnel until the contact between the acid and zinc ceases. The contact of the reactants ceases, and hydrogen ceases to be released.
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