Question

students observed that mixing two clear solutions formed a white solid and released heat. which two terms best describe this reaction? physical & endothermic combustion & single replacement exothermic & precipitation endothermic & synthesis

Explanation:

• Exothermic: Since heat is released during the reaction, it is exothermic. In exothermic reactions, energy (in the form of heat) is given off to the surroundings.
• Precipitation: A white solid (precipitate) is formed when two clear solutions are mixed. A precipitation reaction is a type of chemical reaction where an insoluble solid (precipitate) is formed from the reaction of two aqueous (solution - based) reactants.

Answer:

Exothermic & Precipitation