http://www.ck12.org Chapter 23. Electrochemistry
c. 6Ag(s) + Cr 2 O 72 −(aq) + 14H+(aq)→6Ag+(aq) + 2Cr^3 +(aq) + 7H 2 O(l)- For the following cell combinations, write the overall cell reaction, and calculate the standard cell potential.
a. Zn|Zn^2 +and Mn|Mn^2 +
b. Hg|Hg^2 +and Cr|Cr^3 + - Which of the following is capable of oxidizing bromide ions (Br−) to bromine (Br 2 ) under standard state
conditions? List all that apply. Pb^2 +(aq), Cl 2 (g), Ag+(aq), Cl−(aq), H+(aq), MnO 4 −(aq) in acid - Which of the following metals would react with hydrochloric acid? Ni, Co, Cu, Au, Ba
- Nitric acid (HNO 3 ) is considered to be an oxidizing acid because the nitrate ion (NO 3 −) is a relatively strong
oxidizing agent. Use the table above (Table23.2) to write a balanced equation for the reaction that occurs
when nitric acid reacts with silver metal. Calculate the standard reduction potential. - A Mg|Mg^2 +half-cell is constructed under standard state conditions and connected to another half-cell. The
voltage registered on a voltmeter is 1.97 V. What is a possible identity for the other half-cell?
Further Reading / Supplemental Links
- The Electrochemical Series, (http://www.chemguide.co.uk/physical/redoxeqia/ecs.html
- Redox Potentials for Non-Metal and Other Systems, (http://www.chemguide.co.uk/physical/redoxeqia/nonmetal.html
- Redox Potentials and Simple Test Tube Reactions, (http://www.chemguide.co.uk/physical/redoxeqia/combinations.html
- Making Predictions Using Redox Potentials (Electrode Potentials), (http://www.chemguide.co.uk/physical/redoxeqia/predict.html
Points to Consider
Nonspontaneous redox reactions can be driven to completion by the application of an electric current in a process
called electrolysis.
- How does an electrolytic cell work?
- What is electroplating?