What is the concentration of tin ion in the anode if the Ecell for this reaction is 0.899 V and the initial concentration of silver ion is 0.34 M? (assume 298 K) 2Ag+(aq) + Sn(s) → Sn2+(aq) + 2Ag(s)         E°cell = 0.937

For the following reaction, predict the measured cell potential (Ecell) if the pressure of O₂ is 1.83 atm, the concentration of H* is 7.59 x 10-3 M and the bromide ion concentration is 2.53 M. O₂(g) + 4H*(aq) + 4Br (aq) → 2H₂O(l) + 2Br₂(!) Half reactions: 2Br₂ (1)+4e4 Br (aq) O₂(g) + 4H*(aq) + 4e¯→ 2H₂O(l) O 0.054 V O 2.208 V 0.007 V O 0.250 V 0.033 V E° = +1.077 V E° - +1.229 V

Silver metal can be dissolved in acidic solutions via a redox reaction with generation of hydrogen gas. Which of the following is the correct cell notation for the reaction that will occur?

(19) Consider the following redox reaction that occurs in a voltaic cell: Cr2+ (aq) + Cu²+ (aq) → Cr³+ (aq) + Cut (aq) If the cell is operating at 25°C, what is the value of the equilibrium constant (Keq)? (A) 1.41 x 10¹1 1.19 x 1018 5.53 x 105 2.79 x 1033 1.81 x 10-6 (B) (C) (D) (E)

An electrochemical cell consists of a half-cell in which a piece of platinum wire is dipped into a solution that is 2.5 M in KI and 0.046 M in I2. The other half-cell consists of magnesium metal immersed in a 0.37 M Mg2+ solution. Assume that the temperature is 25°C. (a) Which electrode is the anode and which is the cathode? anode: Pt|I2, I- O Mg²+|Mg cathode: O Pt|I2, I- Mg2+|Mg (b) What is the emf of the cell? 4.0 2.869 X V (c) What is the spontaneous cell reaction? chemPad OHelp Greek - Mg2+(aq)+21 (aq) Mg(s)+I2(aq) Mg(s)+l_2(aq)-->Mg^2+(aq)+2l^-(aq) Your answer appears to have inconsistent states-of-matter. (d) What is the equilibrium constant of the cell reaction? 2.42e98

A copper penny dropped into a solution of nitric acid produces a mixture of nitrogen oxides. The following reaction describes the formation of NO, one of the products. 3Cu(s)+8H*(aq) + 2NO,(aq) → 2NO(g) +3Cu²+(aq) + 4H,0(1) Using the provided standard potentials, calculate E°cell for this reaction. 4H*(aq) + NO,(aq) +3e¯ → NO(g) + 2H,0(1) E° = 0.96 V Cu2+ (aq) +2e¯ → Cu(s) E° = 0.3419 V 1st attempt See Periodic Table O See Hint V