username3835832
Badges: 6
Rep:
?
#1
Report Thread starter 3 years ago
#1
1.In the the topic Redox and electrode potentials in my A2 book, it says electrochemical cells are made up of electrodes
E.g copper electrode and zinc electrode
What are electrodes?

2. It also says you have electrodes made up of platinum and graphite? What does this mean?

3. And I don't understand this piece of text
''You can also use non-metals, like chlorine or hydrogen, as reactants in electrochemical cells. For systems involving gas, the gas can be bubbled over an inert electrode (E.g platinum electrode) sitting in a solution of its aqueous ions (E.g. Cl - or H + ). ''

4. Cell potential means the voltage between two half-cells in an electrochemical cell.
What does voltage mean here?
0
reply
charco
Badges: 17
Rep:
?
#2
Report 3 years ago
#2
(Original post by chemquestion)
1.In the the topic Redox and electrode potentials in my A2 book, it says electrochemical cells are made up of electrodes
E.g copper electrode and zinc electrode
What are electrodes?

2. It also says you have electrodes made up of platinum and graphite? What does this mean?

3. And I don't understand this piece of text
''You can also use non-metals, like chlorine or hydrogen, as reactants in electrochemical cells. For systems involving gas, the gas can be bubbled over an inert electrode (E.g platinum electrode) sitting in a solution of its aqueous ions (E.g. Cl - or H + ). ''

4. Cell potential means the voltage between two half-cells in an electrochemical cell.
What does voltage mean here?
1. "electrode" is the technical term for the part of an electrochemical cell at which chemical reactions take place, both in electrolytic and voltaic cells.

2&3. These electrodes can be inert, such as graphite or platinum, or active such as copper. Platinum has the added advantage of acting as a catalytic surface for some redox processes.

4. "Voltage" is the electromotive force that the electrons experience that push and pull (or try to) the electrons around the external circuit. Electical current is the actual flow of charge (carried by electrons) and this is pulled around the circuit by the potential difference that exists between the electrodes, or provided by an external power source.

Voltage = electromotive force(EMF) = pòtential difference
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

How do you prefer to get careers advice?

I like to speak to my friends and family (8)
9.64%
I like to do my own research online using careers specific websites (54)
65.06%
I like speaking to the careers advisors at school, college or uni (12)
14.46%
I prefer to listen watch videos or listen to podcasts of people in my chosen career (8)
9.64%
Something else (let us know in the thread) (1)
1.2%

Watched Threads

View All