Everything Science Grade 12

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 Exercise 4 - 6 An electrochemical cell is made up of a copper electrode in contact wit ...

4.5 CHAPTER 4. ELECTROCHEMICAL REACTIONS (d) Pb|Pb2+||Hg2+|Hg Given the followingtwo half-reactions: Fe3+(aq) + e−� Fe2+(aq) Mn ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.5 Step 2 : Balance the number ofatoms on both sides ofthe equation. You are allowed to ad ...

4.5 CHAPTER 4. ELECTROCHEMICAL REACTIONS Example 8: Balancing redox reactions QUESTION Chlorine gas oxidises Fe(II) ions to Fe(I ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.5 Step 7 : Do a final check to make sure that the equation is balanced The equation is ba ...

4.5 CHAPTER 4. ELECTROCHEMICAL REACTIONS Step 5 : Multiply each half reaction by a suitable number so that the number of electro ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.5 Although you don’t actually know what productis formed when hydrogen peroxide is reduce ...

4.6 CHAPTER 4. ELECTROCHEMICAL REACTIONS The following equation can be deduced from the table of standardelectrode potentials: ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.6 Electroplating ESCCB Electroplating is the process of using electricalcurrent to coat a ...

4.6 CHAPTER 4. ELECTROCHEMICAL REACTIONS + – + – positive anode negative cathode impure copper electrode pure copper electrode C ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.6 + – + – positive anode negative cathode electrode electrode NaCl solution Cl− Na+ Figur ...

4.6 CHAPTER 4. ELECTROCHEMICAL REACTIONS At the anode: 2 O^2 − → O 2 (g) + 4e− The overall reaction is as follows: 2 Al 2 O 3 → ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.6 One example of an electrolytic cell is the electrolysis of copper sulphate to pro- duc ...

4.6 CHAPTER 4. ELECTROCHEMICAL REACTIONS (b) Consider the reaction represented by the following equation: Br2(l)+ 2I−aq→ 2Br−aq+ ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.6 (IEB Paper 2, 2005) The following reaction takes place in an electrochemical cell: Cu ...

4.6 CHAPTER 4. ELECTROCHEMICAL REACTIONS ii. the cathode (d) Write a balanced nett ionic equation for thereaction which takes pl ...

The Chemical Industry 5 5.1 Introduction The chemical industry has been around for a very long time, but not always in the way w ...

5.2 CHAPTER 5. THE CHEMICAL INDUSTRY Sasol today: Technologyand produc- tion ESCCG Today, Sasol is an oil and gas company with d ...

CHAPTER 5. THE CHEMICAL INDUSTRY 5.2 (2n + 1)H 2 + nCO→ CnH2n+2+ nH 2 O A range of hydrocarbonsare produced, includingpetrol, di ...

5.2 CHAPTER 5. THE CHEMICAL INDUSTRY DEFINITION: Steam cracking Steam cracking occurs under very high temperatures. During the p ...