Science 2012 | Could electrolysis be used to determine the comparative reactivity of metals? |
Contents COULD ELECTROLYSIS BE USED TO DETERMINE THE COMPARATIVE REACTIVITY OF METALS? 2 BACKGROUND 2 Electrolytic and Galvanic corrosion: 3 AIM 5 HYPOTHESIS 6 VARIABLES 6 APPARTATUS 7 DIAGRAM 8 METHOD / PROCEDURE 8 RESULTS 11 Tables 11 Graphing 13 DISCUSSION 14 Graph 1 / 2(Volume of Hydrogen Produced): 14 CONCLUSION 16 EVALUATION 17 Strengths 17 Weaknesses and Improvements: 17
COULD ELECTROLYSIS BE USED TO DETERMINE THE COMPARATIVE REACTIVITY OF METALS?
BACKGROUND
Definitions and Uses:
Electrolysis:
Electrolysis is the electrochemical process where a direct current (DC) drives a non-spontaneous chemical reaction, assisting with the process of chemical decomposition. The electrolytic process requires an: 1. 2 Electrodes: An electrical conductor/terminal (usually metallic) through which electric current passes. They drive the electrolytic reaction by completing the circuit between the DC source and the electrolyte.
An electrode In any electrochemical process is referred to either the Cathode and Anode
Cathode: the electrode which becomes positively charged. During the process, negatively charged ions (Anions) move towards the electrode whilst positively charged ions (Cations) move away.
Anode: Electrode which becomes negatively charged. During the process, positively charged ions (Cations) more towards the electrode whilst negatively charged ions (Anions) move away.
[Electrodes for this experiment are firstly copper and secondly galvanized steel]
(Wikipedia Editor , 2012) (Wikipedia Editor , 2012) (Columbia Electronic Encyclopedia, 2007)
2. Direct Current:
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