The double decomposition reaction between calcium acetate monohydrate and sodium carbonate

Now there are calcium acetate monohydrate ($Ca (CH_3COO) _2\ cdot H_2O $) and sodium carbonate ($Na_2CO_3 $), the two meet, and then the double decomposition occurs.

The reason for the reaction is due to ion exchange. Calcium acetate monohydrate in water dissociates into calcium ions ($Ca ^ {2 +} $) and acetate ions ($CH_3COO ^ - $) with a molecule of crystal water; sodium carbonate also dissociates in water to form sodium ions ($Na ^ + $) and carbonate ions ($CO_3 ^ {2 - }$）。

The ions are mixed, calcium ions are combined with carbonate ions, and calcium carbonate ($CaCO_3 $) is precipitated, which is a white solid insoluble in water. Sodium ions are combined with acetate ions to form sodium acetate ($CH_3COONa $), which is stored in solution. The chemical equation of the reaction is as follows:

$Ca (CH_3COO) _2\ cdot H_2O + Na_2CO_3\ longrightarrow CaCO_3\ downarrow + 2CH_3COONa + H_2O $

This reaction is a recombination of ions, which conforms to the law of metathesis reaction, that is, two compounds exchange components with each other to form two other compounds, and precipitation is formed, which prompts the reaction to proceed to the right and reaches a chemical equilibrium.