8 th Grade Science T Trimpe http sciencespot

8 th Grade Science T. Trimpe http: //sciencespot. net/

Chemical Reactions Watch the movie and then complete the chart. Equation Type of Reaction Definition Synthesis Two or more elements or compounds combine to make a more complex substance Decomposition Compounds break down into simpler substances Single Replacement Occurs when one element replaces another one in a compound AB + C → AC + B Double Replacement Occurs when different atoms in two different compounds trade places AB + CD → AC + BD A + B → AB AB → A + B A = Red B = Blue C = Green D = Yellow

Identifying Chemical Reactions 2. Use colored pencils to circle the common atoms or compounds in each equation to help you determine the type of reaction it illustrates. Use the code below to classify each reaction. S = Synthesis D = Decomposition SR = Single Replacement DR = Double Replacement ____ P + O 2 → P 4 O 10 ____ Mg + O 2 → Mg. O ____ Hg. O → Hg + O 2 ____ Al 2 O 3 → Al + O 2 ____ Cl 2 + Na. Br → Na. Cl + Br 2 ____ H 2 + N 2 → NH 3

____ Na + Br 2 → Na. Br ____ Cu. Cl 2 + H 2 S → Cu. S + HCl ____ Hg. O + Cl 2 → Hg. Cl + O 2 ____ C + H 2 → CH 4 ____ KCl. O 3 → KCl + O 2 ____ S 8 + F 2 → SF 6 ____ Ba. Cl 2 + Na 2 SO 4 → Na. Cl + Ba. SO 4