EVERYDAY SCIENCE

Detailed explanation-1: -Potential signs that chemical reactions have occurred include a change in color, change in temperature, formation of a gas, and formation of a precipitate.

Detailed explanation-2: -A change in color is also another characteristic of a chemical reaction taking place. For example, if one were to observe the rusting of metal over time, one would realized that the metal has changed color and turned orange. This change in color is evidence of a chemical reaction.

Detailed explanation-3: -A color change indicates the formation of a chemical change. This means a chemical reaction is occurring. The rearrangement of electrons between substances results in new substance(s) being formed.

Detailed explanation-4: -Does color change always come from the formation of a precipitate? no, there are many different reasons color changes occurs. Making new, colored products can result from all sorts of chemical reactions (redox, ligand formation, acid/base, conventional substitution reactions just to name a few).

Detailed explanation-5: -There are a number of observations that indicate a chemical reaction has occurred. One is the formation of a precipitate. A precipitate is a solid formed in a chemical reaction that is different from either of the reactants.