Chemical Reactions & Chemical Equations

Chemical Reactions Chemical Change A process involving a substance or substances changing into a new substance or substances

Evidence of a chemical reaction Chemical Reactions Evidence of a chemical reaction

Evidence of a chemical reaction Chemical Reactions Evidence of a chemical reaction 1) A permanent color change 2) A gas is produced 3) Energy is exchanged 4) A precipitate is produced

Chemical Equations A statement using chemical formulas to describe the identities and relative amounts of reactants and products involved in the chemical reaction

Reactant(s)  Product(s)

2 H2 + 1 O2  2 H2O H2 + H2 + O2  H2O + H2O

NH4OH + Ni(NO3)2  NH4NO3 + Ni(OH)2