The oxidation state of S in S2O8²⁻ is:
+7.
-2.
+14.
+8.
Which of the following is true for an electrolytic cell?
Electrons flow towards the anode.
An electric current is produced by a chemical reaction.
A nonspontaneous reaction is forced to occur.
Electrons flow through the salt bridge.
In an electrochemical cell, electrons travel in which direction?
From the anode to the cathode through the external circuit.
From the cathode to the anode through the porous cup.
From the cathode to the anode through the external circuit.
From the anode to the cathode through the porous cup.
To plate a nickel coin with copper:
The nickel coin must be the cathode.
The electrons must flow to the anode.
The solution must contain nickel ions.
The cathode must be made of copper.
