This reaction as written has anegative
potential. It willnot
occur spontaneously. Instead, it is the
reverse process that will readily occur. To drive a
Nonspontaneous redox reaction, a potential greater than
the cell potential is applied from an external source. This
process is called electrolysis.
The positive ions head towards the negative
electrode. Their charge reduces to zero. So the negative
electrode is the called the cathode.
The negative ions head towards the positive electrode.
Their charge increases to zero (oxidation). So the
positive electrode is the called the anode.
--> O2(g) + 2H2(g)
2 NaCl(l) --> 2 Na(l)
Past Regents Questions
Which statement describes electrolysis?
(1) Chemical energy is used to produce an electrical change.
(2) Chemical energy is used to produce a thermal change.
(3) Electrical energy is used to produce a chemical change.
(4) Thermal energy is used to produce a chemical change
Given the balanced equation representing a reaction occurring in an electrolytic
Where is Na(l) produced in the cell?
(1) at the anode, where oxidation occurs
(2) at the anode, where reduction occurs
(3) at the cathode, where oxidation occurs
(4) at the cathode, where reduction occurs
Which process requires an external power source?