Question

You may want to reference (Pages 906 - 909) Section 19.5 while completing this problem. Part A Compute the equilibrium constant at 25°C for the reaction between Ni2+ (aq) and Zn(s), which form Ni(s) and Zn?(aq). Express your answer using two significant figures. mo? AEQ K = 2.02 · 1097 Submit Previous Answers Request Answer * Incorrect; Try Again; 11 attempts remaining

Answer 1

Zn + Ni (2+) ------ Zn(2+) + Ni

E°cell = E(oxidation) + E(reduction)

E°cell = 0.76 +( -0.25) = 0.51 V

∆G° = - n ×F× E°cell = - R× T× lnK

n = 2 ( number of electrons)

F= 96500 C/s

T =25°© = 25+273 = 298 K

2×96500×0.51 = 8.314 J / mol K ×( 298 K) × lnK

39.72 = lnK

K = 1.779× 10^17