Please explain your answer! 13. Given: Under Standard-state Conditions, which of
ID: 866900 • Letter: P
Question
Please explain your answer!
13. Given: Under Standard-state Conditions, which of the following is the best Oxidizing agent? 14. Which of the following statements is true concerning the electrochemical cell depicted below? A) The cell reaction is spontaneous with a standard cell potential of 0.49V. B) The cell reaction is nonspontaneous with a standard cell potential of -5.25V. C) The cell is at equilibrium. D) The cell reaction is spontaneous with a standard cell potential of 5.25V. E) The cell reaction is nonspontaneous with a standard cell potential of -0.49V. 15. Consider the following cell reaction: 2Ag+(aq) + H2(g) 2H+(aq) + 2Ag(s); E degree cell = 0.80 V Under standard-state conditions, what is E degree for the following half-reaction?Explanation / Answer
13. That element will be best oxidising agent which has highest reduction potential.
In the given question, reduction potential is highest for PbO2. So it is best oxidising agent.
Answer: E. PbO2
14.
Eo cell = Eo cathode -Eo anode
= Eo right -Eo left
= -2.87 - (-2.38)
= -0.49
Since standard cell potential is negative it is non spontaneous.
Answer: option E
15.
Ag+ + 1e- --->Ag
This is reduction and occurs at cathode
Eo cell = Eo cathode - Eo anode
0.8 = Eo cathode - 0
Eo cathode = 0.8 V
Answer: option C