ELECTROLYSIS

Abi Riley
Mind Map by Abi Riley, updated more than 1 year ago
Abi Riley
Created by Abi Riley almost 4 years ago
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GCSE Chemistry Mind Map on ELECTROLYSIS, created by Abi Riley on 04/10/2016.

Resource summary

ELECTROLYSIS
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
1.1.1.1 Must be molten OR dissolved in water
1.1.2 The electrolyte is broken down by electricity passed through an ELECTRODE.
1.1.2.1 Positive electrode= ANODE
1.1.2.1.1 Negatively charged ions attracted here
1.1.2.1.1.1
1.1.2.1.1.2 Neg charged chloride ions
1.1.2.1.1.2.1 ANION
1.1.2.2 Negative electrode= CATHODE
1.1.2.2.1 Positively charged ions attracted here
1.1.2.2.1.1 Opposites attract
1.1.2.2.1.2 Pos charged Zinc ions
1.1.2.2.1.2.1 CATION
1.1.2.3 In solids= charge carrier- electrons
1.1.2.4 In liquids= charge carrier- ions
1.1.2.5 Group 1 and transition metals- one extra electron, must gain
1.1.2.5.1 eg: Zinc ions- GAIN electrons. Chloride ions- LOSE electrons.
1.1.3 Electrolyte MUST be molten/solution to conduct.
1.1.3.1 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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