When the current is flowing
A - VCE - SSCE Chemistry - Question 5 - 2006 - Paper 1
Question 5
When the current is flowing
A. the anode is positive and the cathode is negative.
B. an oxidation reaction occurs at the positive electrode.
C. anions in the salt br... show full transcript
Worked Solution & Example Answer:When the current is flowing
A - VCE - SSCE Chemistry - Question 5 - 2006 - Paper 1
Step 1
A. the anode is positive and the cathode is negative.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is true based on the convention used in electrochemistry. The anode is indeed positive when the current flows in an electrochemical cell.
Step 2
B. an oxidation reaction occurs at the positive electrode.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is false. Oxidation occurs at the anode, which is the negative electrode in a galvanic cell, not the positive electrode.
Step 3
C. anions in the salt bridge move towards the negative electrode.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is also true. Anions from the salt bridge flow towards the anode, counterbalancing the positive charge developing there.
Step 4
D. electrons travel in the external circuit from the cathode to the anode.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is incorrect. Electrons actually flow from the anode to the cathode in the external circuit.
