double replacement reaction
The metathesis reaction is a reaction in which two compounds exchange components to produce another two compounds. The essence of the metathesis reaction is that the two compounds in the metathesis reaction exchange ions in an aqueous solution and combine to form difficult-to-ionize precipitates, gases or weak electrolytes (the most common It is water), which reduces the ion concentration in the solution, and the chemical reaction proceeds in the direction of the decrease in the ion concentration.