The equation ZnCO3 + 2HCl -> ZnCl2 + CO2 + H2O

  1. Details about the equation: This is a chemical equation describing the reaction process between the precipitate ZnCO3 (zinc carbonate) and strong acid HCl (hydrochloric acid), resulting in the salt ZnCl2 (zinc chloride), CO2 gas (carbon dioxide), and water.

  2. Reaction conditions: The standard conditions for this reaction are at room temperature and standard pressure. It also requires the presence of HCl for the reaction to occur.

  3. Reaction process: When ZnCO3 comes into contact with HCl, the reaction happens quickly, creating ZnCl2, CO2, and H2O. This reaction is an acid-base reaction according to the Arrhenius definition (an acid is a substance that produces H+ in solution, a base is a substance that produces OH- in solution). In this case, HCl acts as an acid and ZnCO3 acts as a base.

  4. Phenomenon occurrence: When the reaction occurs, we will see CO2 gas bubbles start to rise from the solution. This is a clear sign indicating a physical change taking place during the reaction process. In addition, the ZnCO3 precipitate will gradually disappear, while the ZnCl2 solution is formed.

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