Xiangzi accidentally knocked over a bottle of vinegar while cleaning up the kitchen. When vinegar was sprinkled on a pile of plant ash by the fire, it was found that a large number of bubbles were gen

Xiangzi accidentally knocked over a bottle of vinegar while cleaning up the kitchen. When vinegar was sprinkled on a pile of plant ash by the fire, it was found that a large number of bubbles were generated, which aroused interest. (1) The pH value of plant ash solution is greater than 7, indicating that the solution is alkaline;

(2) When burning, the flame is purple through the blue cobalt glass sheet, indicating that plant ash must contain potassium;

Expanding the application of plant ash, plant ash is alkaline in water and can react with ammonium nitrogen fertilizer to release ammonia, which reduces the fertilizer efficiency. plant ash cannot be mixed with ammonium nitrogen fertilizer.

Conclusion Carbon dioxide can make the clarified limewater turbid, and carbonate reacts with acid to release carbon dioxide, so a large number of bubbles are observed in the test tube, and the clarified limewater becomes turbid. Then plant ash must contain carbonate, and potassium carbonate reacts with hydrochloric acid to generate potassium chloride, water and carbon dioxide. The chemical equation of the reaction is K2CO3+2HCl = 2KCl+H2O+CO2 ↑;

Expand the application of potassium carbonate in plant ash, and react with organic acids produced by dough fermentation to produce carbon dioxide.

So the answer is:

(1) alkali;

(2) potassium;

Ammonia is produced by expanding the application, and the fertilizer fails;

Explore the conclusion carbonate; k2co 3+2 HCl = 2k cl+H2O+CO2↑；

Expand the application of carbon dioxide ..