CHAPTER 6 TEST REVIEW Understanding Chemical Reactions Sections

CHAPTER 6 TEST REVIEW Understanding Chemical Reactions

Sections We’ve Covered Section 6. 1 - Word Equations Section 6. 3 - Law of Conservation of Mass Section 6. 5 - Balancing Chemical Equations Section 6. 6 - Combustion Section 6. 7 - Synthesis & Decomposition Reactions Section 6. 10 - Single & Double Displacement Reactions

Section 6. 1 – Word Equations A chemical reaction is represented by the following word equation: magnesium + sulfuric acid —> hydrogen + magnesium sulfate (a) What are the products of this reaction? (b) What are the reactants in this reaction? Write word equations for the following chemical reactions. (a) Tarnish (Ag 2 S) forms when a silver spoon is

Section 6. 3 – Conservation of Mass In all chemical reactions the: (a) mass and volume of both the reactants and the products must be equal. (b) masses of the combining chemicals must be equal. (c) volume of the reactants equals the volume of the products. (d) volumes of the combining reactants must be equal. (e) mass of the reactants equals the mass of the products.

Section 6. 5 – Balancing Chemical Equations Balance the following equation: Cu + H 2 SO 4 —> Cu. SO 4 + H 2 O + SO 2

Section 6. 6 - Combustion (a) Complete the following equation and balance it. C 4 H 8 + O 2 —> ________ (b) Classify the reaction type Answer (a) C 4 H 8 + 6 O 2 —>4 CO 2 + 4 H 2 O

Section 6. 7 Synthesis & Decomposition Reactions Balance and classify each of the following as either a synthesis or a decomposition reaction. (a) Hg. O —> Hg + O 2 (b) Al + O 2 —> Al 2 O 3 (c) SO 3 + H 2 O —> H 2 SO 4 Answer (a) 2 Hg. O —> 2 Hg + O 2 decomposition (b) 4 Al +3 O 2 —> 2 Al 2 O 3 synthesis (c) SO 3 + H 2 O —> H 2 SO 4 synthesis

Section 6. 10 Single & Double Displacement Reactions Classify each of the following reactions. (a) 2 KI + Pb(NO 3)2 —> Pb. I 2 + KNO 2 (b) Fe + Cu. SO 4 —> Cu + Fe. SO 4 (c) 2 Li + H 2 O —> 2 Li. OH + H 2 (d) Ca(OH)2 + 2 HBr —> 2 H 2 O + Ca. Br 2 Answer (a) double displacement (b) single displacement (c) single displacement (d) double displacement

Test Format Multiple Choice Fill in the Blanks Short Answer � Write type. skeleton equation, balance, state reaction

Please Complete Chapter 6 Review Questions Page 252 #s 1, 4, 5, 6, 7