Everything Science Grade 12

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.3 The electrolysis of copper sulphate ESCBO There are a number of examples of electrolysi ...

4.3 CHAPTER 4. ELECTROCHEMICAL REACTIONS At the positive anode,copper metal is oxidisedto form Cu2+ions. This is why it appears ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.3 Item Galvanic cell Electrolytic cell Metals used for electrode Two metals with differen ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 Standard ElectrodePotentials ESCBR If a voltmeter is connected in the circuit of an ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 --2+ 2+ 2+ 2+ 2+ Zn2+ions in solution zinc metal concentrat ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS Measuring electrode potential ESCBU If we put the two half cells together, a potential ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 A B C You could summarise your findings as follows: Person Height relative to post (cm) ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS � �� �� �� �� �� [H 3 O+] (1 mol.dm−^3 ) Pt^25 ◦C H 2 gas (1 x atmospheric pressure) Fi ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 In the zinc half-reaction, the equilibrium lies far to the left and in the hydrogen hal ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS V H electrode Cu electrode Figure 4.5: When copper is connected t ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 Metal ions at the bottom of the table are goodat picking up electrons.They are easily ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS Half-Reaction E◦V Li++ e−� Li − 3. 04 K++ e−� K − 2. 92 Ba2++ 2e−� Ba − 2. 90 Ca2++ 2e− ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 Example 3: Using the table of Standard Electrode Potentials QUESTION Is magnesium able ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS Exercise 4 - 4 In your own words, explain what is meant bythe ’electrode potential’of ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 (d) Cr 2 O^27 − (IEB Paper 2, 2004) If zinc is added to asolution of magnesiumsulphate ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS DEFINITION: Standard emf (E◦cell) Standard emf is the emfof a voltaic cell operating un ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 Example 4: Calculating the emf ofa cell QUESTION The following reaction takes place: Cu ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS Example 5: Calculating the emf ofa cell QUESTION Calculate the cell potential of the el ...

CHAPTER 4. ELECTROCHEMICAL REACTIONS 4.4 Look at the electrode potential for the first half reaction. The negative value shows t ...

4.4 CHAPTER 4. ELECTROCHEMICAL REACTIONS Exercise 4 - 5 Predict whether thefollowing reaction willtake place spontaneously or n ...