## galvanic cells

Sophia Dinh 1D
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### galvanic cells

How can you tell which is the anode vs cathode if the cell potential is given?

Jacey Yang 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

### Re: galvanic cells

The cathode has the more positive cell potential, the anode has the more negative cell potential.

Daniela Shatzki 2E
Posts: 53
Joined: Sat Aug 24, 2019 12:16 am

### Re: galvanic cells

if two are given you can't use the formula Ecell = Ecathode - Eanode and then decide which is which based on which arrangement will give you a positive overall value.

Junwei Sun 4I
Posts: 125
Joined: Wed Oct 02, 2019 12:16 am

### Re: galvanic cells

If you are given the cell potential then the more positive one is the cathode. Since in a galvanic cell Ecell =Ecathode - Eanode has to be positive.

Juana Abana 1G
Posts: 100
Joined: Wed Sep 18, 2019 12:15 am

### Re: galvanic cells

Daniela Shatzki 2E wrote:if two are given you can't use the formula Ecell = Ecathode - Eanode and then decide which is which based on which arrangement will give you a positive overall value.

Does this work all the time?

Sartaj Bal 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

### Re: galvanic cells

A positive potential difference between the electrodes signals that electrons are flowing from the left to the right or from the anode to the cathode, signifying which is which.

Posts: 97
Joined: Tue Feb 12, 2019 12:15 am

### Re: galvanic cells

If the standard cell potential is given then you will know the half reaction is an anode if it is more negative than the half reaction of the cathode. In other words, the more positive Ecell is the cathode and the more negative Ecell is the anode.

VLi_2B
Posts: 99
Joined: Sat Sep 14, 2019 12:15 am

### Re: galvanic cells

You want the value to be positive because that means the reaction is spontaneous.

205405339
Posts: 77
Joined: Thu Jul 11, 2019 12:16 am

### Re: galvanic cells

the half reaction with the more negative reduction potential will be the anode