Difference between revisions of "GCSE Chemistry Required Practical: Electrolysis of a Solution"
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#Attach a [[Direct Current|direct current]] [[Power Pack|power pack]] to the [[electrode]]s using wires and crocodile clips. | #Attach a [[Direct Current|direct current]] [[Power Pack|power pack]] to the [[electrode]]s using wires and crocodile clips. | ||
#Set the [[Potential Difference|potential difference]] to 4 [[Volt]]s. | #Set the [[Potential Difference|potential difference]] to 4 [[Volt]]s. | ||
| − | #Record your [[observation]]s of changes at each [[electrode]]. You may also use a [[pH indicator]] paper next to the [[anode]] and note any colour change. | + | #Record your [[observation]]s of changes at each [[electrode]]. You may also use a [[pH indicator]] paper next to the [[anode]] but above the [[solution]] and note any colour change. |
#After 5 minutes turn off the [[Power Pack|power pack]] and remove the [[cathode]] to [[observe]] whether any changes have taken place. | #After 5 minutes turn off the [[Power Pack|power pack]] and remove the [[cathode]] to [[observe]] whether any changes have taken place. | ||
#Repeat this experiment for the following [[solution]]s; [[Copper (II) Sulphate]], [[Sodium Chloride]] and [[Sodium Sulphate]]. | #Repeat this experiment for the following [[solution]]s; [[Copper (II) Sulphate]], [[Sodium Chloride]] and [[Sodium Sulphate]]. | ||
Revision as of 17:59, 28 January 2019
Key Stage 4
Meaning
Perform an electrolysis experiment to observer what happens when an aqueous solution is electrolysed.
Method
- Pour 50ml of Copper (II) Chloride solution into a 100ml beaker.
- Place two Carbon electrodes held apart from one another by an electrical insulator.
- Attach a direct current power pack to the electrodes using wires and crocodile clips.
- Set the potential difference to 4 Volts.
- Record your observations of changes at each electrode. You may also use a pH indicator paper next to the anode but above the solution and note any colour change.
- After 5 minutes turn off the power pack and remove the cathode to observe whether any changes have taken place.
- Repeat this experiment for the following solutions; Copper (II) Sulphate, Sodium Chloride and Sodium Sulphate.