What are all the conditions for judging the equilibrium of chemical reactions?

1. If there is discoloration, there will be a reaction, and if the color remains unchanged, the chemical reaction will be balanced.

2. The positive and negative reaction rates of chemical reactions are equal and not zero.

3. If the amount of substances before and after the equal sign in the chemical equation is not equal, the amount of substances remains the same, that is, the chemical reaction reaches equilibrium.

4. Density, pressure and temperature, etc. It can be judged by PV=nRT that other conditions remain unchanged, and only one of them changes during the reaction, so it can be judged whether the chemical reaction reaches equilibrium.

I hope my answer can help everyone, thank you!