It is given in ncert book pg 141last para that 'positively charged particles move towards cathode and negatively charged particles move towards anode.' And this following diagram is given. Pls tell me the correct data. Is the diagram wrong or the given info. wrong?
 

Dear Student,

Here I am providing you information related to the sign of cathode and anode electrode.

Important Note: At cathode : Always Reduction takes place
At anode: Oxidation takes place

Type of cells :

 

Electrolytic cell	Galvanic cell
Convert electrical energy to chemical energy	Convert chemical energy to electrical energy
Cathode : positive(+) Anode: Negative(-)	Cathode: Negative Anode: Positive

Now,  In electrophoresis , cell is electrolytic cell so signs are at cathode positive and at anode negative

Electrophoresis:

• Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field.
• It is ultimately caused by the presence of a charged interface between the particle surface and the surrounding fluid.
• It is usually carried out in aqueous solution.
• By using this technique, a mixture of molecules of various sizes will migrate at different velocities and will be separated.