Tap the stronger pull on electrons

Exercise and reference answers

Questions

1. A

   Cu2+ + 2e- to Cu

   B

   Zn2+ + 2e- to Zn

   Higher value

   Cu2+ + 2e- to Cu

2. A

   Mg2+ + 2e- to Mg

   B

   Ag+ + e- to Ag

   Higher value

   Ag+ + e- to Ag

3. A

   F2 + 2e- to 2F-

   B

   Cl2 + 2e- to 2Cl-

   Higher value

   F2 + 2e- to 2F-

4. A

   Ni2+ + 2e- to Ni

   B

   Pb2+ + 2e- to Pb

   Higher value

   Pb2+ + 2e- to Pb

5. A

   Li+ + e- to Li

   B

   Na+ + e- to Na

   Higher value

   Na+ + e- to Na

Instructions

Tap the half-reaction in each pair that has the higher standard reduction potential.

Explanation