Synthesis and Decomposition

Synthesis and Decomposition

First, we learned about the definition of a chemical change. A chemical change results when substances chemically react to produce a new compound(s). Next, we learned about  the processes of synthesis and decomposition. Synthesis is when two or more reactants react chemically to from one product. Decomposition is when one reactant splits into several compounds or substances. Synthesis and decomposition reactions are technically the same processes, and they are just flipped vice versa.  Also, we learned how to use the ember from a burning splint to determine what gases are being released.  If carbon dioxide is being released, then the ember will fade. If oxygen is released, the ember will continue glowing without exploding. If hydrogen is being released, then the ember will explode.  We also learned how to predict the products of synthesis and decomposition reactions while using phase symbols:

Phase symbols: s-solid, g-gas, l-liquid, aq- aqueous 

This is what happens when you put a splint with ember when oxygen gas is being released. http://physical-science.tripod.com/id25.html