Purchase Solution

# Electrochemistry Galvanic Cells

Not what you're looking for?

Two half reactions that join electrically measuring voltage relationship between temp and cell voltage calculating thermodynamic functions.

1. Consider the cell consisting ofthe Fe3+(lM)/ Fe2+and and Br2(latm)/ Br-(lM) redox couples.

a. Write the reduction half-reaction and the corresponding standard reduction potential and
indicate which electrode does this occur at. .

b. Write the oxidation half reaction and the corresponding oxidation potential indicate which
electrode does this occur at. ...

c. Write the equation of the overall cell reaction and the value of EOcell?

2. Determine the cell voltage. EOcell. of a galvanic cell consisting of Sn+2(lM) / Sn and Cr+3 (lM)/ Cr redox couples.

3. Use the Nemst Equation to determine the cell potential. Ecell. of the galvanic cell consisting of Sn+2(O.OOOlM)ISn and Cr+3 (O.lM)/Cr redox couples.

4. State the purpose of the salt bridge in the experiment?

5. What is the sign of the anode in a galvanic cell? at the cathode?

##### Solution Summary

This Solution contains over 500 words to aid you in understanding the Solution to these questions.

##### Solution Preview

1a)
Br2 + 2 e-  2 Br-
Eo = 1.07 V
Occurs at cathode

Explanation: note that all galvanic cells have a positive overall potential (after addition the potential for the reduction half reaction and the potential for the oxidation half reaction). In order to have a positive overall potential, we ALWAYS want the more positive half reaction to be the reduction half reaction, that is, Br2 + 2 e-  2 Br-. In all types of cells, the reduction always occurs at the cathode.

1b)
Fe2+  Fe3+ + e-
Eo = - 0.77 V
Occurs at anode

Explanation: always remember to flip the equation for the oxidation half reaction in order to have the electron(s) ...

##### Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

##### Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.

##### Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

##### Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.