A precipitation solution is just like asking what is a precipitate; it is an insoluble solid compound that forms out of the water solution in an aqueous solution.
Ex.) AgNO3(aq) + KCl (aq) ---->...
There are so many examples of exothermic reactions that is the reactions in whoch energy is released. All the oxidation reactions are exothermic reactions . similarly hydrogenation of alkenes like...
An endothermic reaction is one that takes in light or heat energy. For example, the enthalpy of solution for acetic acid dissolving in water is negative so it uses heat and hence is exothermic The...