What reaction will take place at the Cathode and the anode when each of the following is electrolyzed? a. molten KF b. molten CUCl 2 c. molten MgI 2

Interpretation:

The reactions that take place at the cathode and the anode when molten KF , CuCl2 and MgI2 are electrolyzed.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal. The electrolytic cell involves a cathode and an anode, both dipped into an electrolytic solution having both the positive and negative ions.

To determine: The reactions that take place at the cathode and the anode when molten KF is electrolyzed.

The reaction taking place at cathode is,

K++e−→K

The reaction taking place at anode is,

F−→12F2+e−

Explanation

In the electrolysis process, the cations move towards the cathode and the anions move towards the anode. The anions lose electrons at the anode and get converted to a neutral species, while the cations accept the electrons from the cathode that are transferred to it by the anode and get converted to a neutral species.

The electrolysis of molten KF is represented by the reactions taking place at the cathode and the anode. The reaction involved for electrolysis is,

KF→K++F−

The reaction taking place at cathode is,

K

Interpretation:

The reactions that take place at the cathode and the anode when molten KF , CuCl2 and MgI2 are electrolyzed.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal. The electrolytic cell involves a cathode and an anode, both dipped into an electrolytic solution having both the positive and negative ions.

To determine: The reactions that take place at the cathode and the anode when molten CuCl2 is electrolyzed.

The reaction taking place at cathode is,

Cu2++2e−→Cu

The reaction taking place at anode is,

2Cl−→Cl2+2e−

Interpretation:

The reactions that take place at the cathode and the anode when molten KF , CuCl2 and MgI2 are electrolyzed.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal. The electrolytic cell involves a cathode and an anode, both dipped into an electrolytic solution having both the positive and negative ions.

To determine: The reactions that take place at the cathode and the anode when molten MgI2 is electrolyzed.

The reaction taking place at cathode is,

Mg2++2e−→Mg

The reaction taking place at anode is,

2I−→I2+2e−