What is the standard reduction potential of the half-reaction Cu2+ + 2e- → Cu? (
Practice Questions
Q1
What is the standard reduction potential of the half-reaction Cu2+ + 2e- → Cu? (2022)
+0.34 V
+0.76 V
-0.34 V
-0.76 V
Questions & Step-by-Step Solutions
What is the standard reduction potential of the half-reaction Cu2+ + 2e- → Cu? (2022)
Step 1: Understand what a half-reaction is. A half-reaction shows either the reduction or oxidation of a substance. In this case, we have the reduction of Cu2+ to Cu.
Step 2: Identify the half-reaction given: Cu2+ + 2e- → Cu. This means copper ions (Cu2+) gain 2 electrons (2e-) to become solid copper (Cu).
Step 3: Know that the standard reduction potential is a measure of how easily a species gains electrons. A higher value means a stronger tendency to gain electrons.
Step 4: Look up the standard reduction potential for the half-reaction Cu2+ + 2e- → Cu in a standard reference table. This value is +0.76 V.
Step 5: Interpret the value. A standard reduction potential of +0.76 V indicates that Cu2+ has a strong tendency to gain electrons and be reduced to Cu.
