University:
Glendale Community College
Course:
CHM130 | Fundamental Chemistry
Academic year:

2020
Views:

248

Pages:

2
Author:

elektrikep

CHM 130: Redox Practice Problems 1. Determine the charge for each of the following: a. O2: O: ____ b. Al2S3: Al: ____ c. P4: P: ____ d. Cd3N2: Cd: ____ N: ____ j. K(s): K: ____ e. MgCl2: Mg: ____ Cl: ____ k. H2S: H: ____ f. Na(s): Na: ____ l. I2: I: ____ S: ____ g. NH3: N: ____ H: ____ h. PbO2: Pb: ____ O: ____ i. HBr: H: ____ Br: ____ S: ____ 2. For each of the following, Balance the equation, Identify the reactant oxidized and the reactant reduced. A. ____ HCl (aq) + ____Zn (s) → ____H2 (g) + ____ZnCl2 (aq) B. ____ CuCl2 (aq) + ____ Al (s) → ____ Cu (s) + ____ AlCl3 (aq) C. ____ Na (s) + ____Cl2 (g) → ____ NaCl (s) D. ____ HBr (aq) + ____Mg (s) → ____H2 (g) + ____MgBr2 (aq) E. ____ Fe (s) + ____ O2 (g) → ____ Fe2O3 (s) F. ____ AlCl3 (aq) + ____ Mg (s) → ____ Al (s) + ____ MgCl2 (aq) CHM 130: Redox Practice Problems Key 1. Determine the charge for each of the following: a. O2: O: 0 b. Al2S3: Al: +3 c. P4: P: 0 d. Cd3N2: Cd: +2 e. MgCl2: Mg: +2 f. Na: Na: 0 g. NH3: N: -3 H: +1 h. PbO2: Pb: +4 O: –2 i. HBr: H: +1 Br: –1 N: –3 j. K: K: 0 Cl: –1 k. H2S: H: +1 S: –2 l. I2: S: –2 I: 0 2. For each of the following, Balance the equation, Identify the reactant oxidized and the reactant reduced. +1 | -1 0 0 +2 | -1 A. 2 HCl (aq) + Zn (s) → H2 (g) + ZnCl2 (aq) H+1 in HCl(aq) is the reactant reduced. Zn(s) is the reactant oxidized. +2 | -1 0 0 +3 | -1 B. 3 CuCl2 (aq) + 2 Al (s) → 3 Cu (s) + 2 AlCl3 (aq) Cu2+ in CuCl2 (aq) is the reactant reduced. Al(s) is the reactant oxidized. 0 0 +1 | -1 C. 2 Na (s) + Cl2 (g) → 2 NaCl (s) Cl2 (g) is the reactant reduced. Na(s) is the reactant oxidized. +1 | -1 0 0 +2 | -1 D. 2 HBr (aq) + Mg (s) → H2 (g) + MgBr2 (aq) H+1 in HBr(aq) is the reactant reduced. Mg(s) is the reactant oxidized. 0 0 +3 | -2 E. 4 Fe (s) + 3 O2 (g) → 2 Fe2O3 (s) O2(g) is the reactant reduced. Fe(s) is the reactant oxidized. +3 | -1 0 0 +2 | -1 F. 2 AlCl3 (aq) + 3 Mg (s) → 2 Al (s) + 3 MgCl2 (aq) Al3+ in AlCl3(aq) is the reactant reduced. Mg(s) is the reactant oxidized.