Chemistry Buffer solutions and electrophoresis in seperating amino acids

[Saba]

Homework Statement

Hi, I have posted the question, the answer to the question as well as the data needed for PI. My concern is why do they say anode is a positive terminal here? is anode always the positive terminal and cathode negative terminal in electrophorisis?

Thanks!

Relevant Equations

NA

 

[mjc123]

From Wikipedia article on Gel Electrophoresis:
"Species that are net positively charged will migrate towards the cathode which is negatively charged (because this is an electrolytic rather than galvanic cell), whereas species that are net negatively charged will migrate towards the positively charged anode."

 

[Saba]

From Wikipedia article on Gel Electrophoresis:
"Species that are net positively charged will migrate towards the cathode which is negatively charged (because this is an electrolytic rather than galvanic cell), whereas species that are net negatively charged will migrate towards the positively charged anode."

ohh so they use electrolytic cells in electropherisis. I didn't know that thank you.

 

[Mayhem]

ohh so they use electrolytic cells in electropherisis. I didn't know that thank you.

A voltage is applied -> electrolytic
A voltage is supplied -> electrochemical

Roughly speaking.