Abi Riley
Mind Map by Abi Riley, updated more than 1 year ago
Abi Riley
Created by Abi Riley almost 4 years ago


GCSE Chemistry Mind Map on ELECTROLYSIS, created by Abi Riley on 04/10/2016.

Resource summary

1 The breakdown of an ionic compound into its elements by use of electricity
1.1 decomposition of an electrolyte by passage of an electric current= electrolosis
1.1.1 Electrolyte= substance which will conduct electric current Must be molten OR dissolved in water
1.1.2 The electrolyte is broken down by electricity passed through an ELECTRODE. Positive electrode= ANODE Negatively charged ions attracted here Neg charged chloride ions ANION Negative electrode= CATHODE Positively charged ions attracted here Opposites attract Pos charged Zinc ions CATION In solids= charge carrier- electrons In liquids= charge carrier- ions Group 1 and transition metals- one extra electron, must gain eg: Zinc ions- GAIN electrons. Chloride ions- LOSE electrons.
1.1.3 Electrolyte MUST be molten/solution to conduct. thus, ions are free to move
1.2 Ionic compound= positive ions (atoms which lost negative electrons) and negative ions (atoms which gained negative electrons)
2 2 ways to split up ions
2.1 Take alot to break a strong ionic bond in a GIANT structure- but with enough energy will melt and become molten
2.2 Dissolve in water.
3 eg; Zinc Chloride electrolysed= Zinc metal+Chlorine gas
4 Electrolysis can only occur on FREE substances
5 1. Melt 2. Place electrodes in melt 3. Flick Switch
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