b Use any of the following data at 25 C to calculate for this reaction at 25 C

B use any of the following data at 25 c to calculate

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(b) Use any of the following data at 25 °C to calculate for this reaction at 25 °C: for , , and standard reduction potentials are 17.141 Consider the redox titration of 100.0 mL of a solution of in 1.50 M H 2 SO 4 with a 0.010 M solution of KMnO 4 , yielding and . The titration is carried out in an electrochemical cell equipped with a platinum electrode and a calomel reference electrode consisting of an Hg 2 Cl 2 /Hg electrode in contact with a saturated KCl solution having . Using any data in Appendixes C and D, calcu- late the cell potential after addition of (a) 5.0 mL, (b) 10.0 mL, (c) 19.0 mL, and (d) 21.0 mL of the KMnO 4 solution. [Cl - ] = 2.9 M Mn 2 + Fe 3 + 0.010 M Fe 2 + E ° = 1.401 V Au 3 + ( aq ) + 2 e - ¡ Au + ( aq ) E ° = 1.498 V Au 3 + ( aq ) + 3 e - ¡ Au( s ) E ° = 1.229 V O 2 ( g ) + 4 H + ( aq ) + 4 e - ¡ 2 H 2 O( l ) K a for HCN = 4.9 * 10 - 10 Au(CN) 2 - = 6.2 * 10 38 K f ¢ G ° Au( s ) + CN - ( aq ) + O 2 ( g ) ¡ Au(CN) 2 - ( aq ) E ° = - 0.380 V MnO(OH)( s ) + H 2 O( l ) + e - ¡ Mn(OH) 2 ( s ) + OH - ( aq ) FeO 4 2 - Anode: Zn(s) + 2 OH - ( aq ) ¡ Zn(OH) 2 ( s ) + 2 e - Cathode: MnO 2 ( s ) + H 2 O( l ) + e - ¡ MnO(OH)( s ) + OH - ( aq ) K E ° K E ° O 2 ( g ) + 4 e - ¡ 2 O 2 - ( s ) Anode: C 4 H 10 ( g ) + 13 O 2 - ( s ) ¡ 4 CO 2 ( g ) + 5 H 2 O( l ) + 26 e -
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