Electrochemistry Study Guide

ELECTROLYSIS STUDY GUIDE:

If you know these answers, you will get an A in the exam

Vocabulary:

(you need to UNDERSTAND the definitions of the following words

1. 1. Electrochemistry
   2. Electrolysis
   3. Conductor
   4. Insulator
   5. Electrode
   6. Electrolyte
   7. Anode
   8. Cathode
   9. Reduction
   10. Oxidation
   11. Half equation

Review and be sure you understand the process of:

• • Electrolysis
  • which is the name of the positive electrode
  • which is the name of the negative electrode
  • which is the ion attracted to the anode
  • which is the ion attracted to the cathode
  • which is the half reaction in the anode (oxidation or reduction?)
  • which is the half reaction in the cathode (oxidation or reduction?)
  • the importance of electrolytes
  • uses for the products of electrolysis

1.Electrolysis of water using sulfuric acid as the electrolyte

1. 1. what are the electrodes made of?
   2. half equation in the cathode
   3. half equation in the anode
   4. which are the ions present in the solution?
   5. what would you observe if you perform the electrolysis?

2.Electrolysis of Brine (Concentrated solution of Sodium Chloride)

1. 1. what are the electrodes made of?
   2. half equation in the cathode
   3. half equation in the anode
   4. which are the ions present in the solution?
   5. what would you observe if you perform the electrolysis?
   6. Industrial uses of Chlorine gas
   7. Industrial uses of Hydrogen gas
   8. Industrial uses of sludge :Sodium hydroxide

 3. Electrolysis of molten Lead Bromide (if you do not remember, just watch the following video) 

1. 1. what are the electrodes made of?
   2. half equation in the cathode
   3. half equation in the anode
   4. which are the ions present in the solution?
   5. what would you observe if you perform the electrolysis?

4. Electrolysis of Sodium Iodide solution (if you do not remember, just watch the following video) 

1. 1. what are the electrodes made of?
   2. half equation in the cathode
   3. half equation in the anode
   4. which are the ions present in the solution?
   5. what would you observe if you perform the electrolysis?

5. Electrolysis of Copper using carbon electrodes

1. 1. what are the electrodes made of?
   2. half equation in the positive electrode
   3. half equation in the negative electrode
   4. which are the ions present in the solution?
   5. what would you observe if you perform the electrolysis

6. Electrolysis of Copper using copper electrodes

1. 1. which is the purpose of this electrolysis?
   2. why is it important to use pure copper?
   3. which are the impurities present in the copper being broken down?
   4. half equation in the cathode
   5. half equation in the anode
   6. which are the ions present in the solution?
   7. what would you observe if you perform the electrolysis?
   8. Uses of sludge (mixture of Gold, Silver and Platinum

7. Electroplating

1. 1. which is the purpose of this method?
   2. In what electrode would you place the element to be plated?
   3. How are the electrolyte and the anode related?
   4. why is it important that the anode is made of a pure metal?
   5. half equation in the cathode
   6. half equation in the anode
   7. what would you observe if you perform the electrolysis?