# redox - Calculations: Equation for the oxidation-reduction...

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Calculations: Equation for the oxidation-reduction reaction: 5C 2 O 4 2- + 2MnO 4 - + 16H + → 2Mn 2+ + 10CO 2 + 8H 2 O Moles of KMnO 4 reduced Moles of C 2 O 4 oxidized Weight of oxidized C 2 O 4 Experimental weight % of oxalate in sample Average percent weight of oxalate = 53.4% Standard deviation = 1.20 Theoretical weight percent of oxalate in the coordination compound = 60.4% Percent error = Table 1: Group Molarity of KMnO 4 (mole/L) Trial 1: Mass of coordination compound (g) Trial 2: Mass of coordination compound (g) Trial 3: Mass of coordination compound (g) Trial 1: vol. KMnO 4 (ml) Trial 2: vol. KMnO 4 (ml) Trial 3: vol. KMnO 4 (ml) 1 0.0200 0.100 0.100 0.0950 12.3 11.9 11.4

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2 0.0200 0.111 0.104 0.101 13.6 12.7 13.3 3 0.0200 0.103 0.102 0.106 13.0 11.5 11.9 4 0.0200 0.102 0.100 0.100 12.1 12.1 12.4 5 0.0200 0.0990 0.107 0.108 14.5 12.0 14.0 6 0.0200 0.100 0.100 0.102 12.0 12.5 12.2 7 0.0200 0.102 0.105 0.0930 11.5 12.6 12.75 8 0.0200 0.103 0.115 0.102 12.4 13.2 12.4 9 0.0200 0.122 0.0960 0.106 12.7 11.0 11.7 Table 2: group Trial 1 mol KMnO 4 Trial 2mol KMnO 4 Trial 3 mol KMnO 4 Trial 1 moles oxidize d C 2 O 4 Trial 2 moles oxidize d C 2 O 4 Trial 3 moles oxidize d C 2 O 4 Trial 1 Wt. oxidize d C 2 O 4 (g) Trial 2 Wt. oxidize d C 2 O 4 (g) Trial 3 Wt. oxidize d C 2 O 4 (g) Trial 1 Exp. Weight % oxalate Trial 2 Exp. Weight % oxalate Trial 3 Exp. Weight % oxalate ave % wt. oxalate Std dev % error 1 2.46 x 10 -4 2.38 x 10 -4 2.28 x 10 -4 6.15 x 10 -4 5.95 x 10 -4 5.70 x 10 -4 0.054 1 0.052 4 0.050 2 54.1 52.4 52.8 53.1 0.889 12.1 2 2.72 x 10 -4 2.54 x 10 -4 2.66 x 10 -4 6.80 x 10 -4 6.35 x 10 -4 6.65 x 10 -4 0.059 9 0.055 9 0.058 5 54.0 53.8 57.9 55.2 2.31 8.55 3 2.60 x 10 -4 2.30 x 10 -4 2.38 x 10 -4 6.50 x 10 -4 5.75 x 10 -4 5.95 x 10 -4 0.057 2 0.050 6 0.052 4 55.5 49.6 49.4 51.5 3.47 14.7 4 2.42 x 10 -4 2.42 x 10
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## This note was uploaded on 02/02/2012 for the course CHEMISTRY 212 taught by Professor Ha during the Spring '11 term at George Mason.

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redox - Calculations: Equation for the oxidation-reduction...

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