null
US
Sign In
Sign Up for Free
Sign Up
We have detected that Javascript is not enabled in your browser. The dynamic nature of our site means that Javascript must be enabled to function properly. Please read our
terms and conditions
for more information.
Next up
Copy and Edit
You need to log in to complete this action!
Register for Free
4878495
GCSE AQA Chemistry 2 Salts & Electrolysis
Description
Mind map showing information about acids, alkalis, making salts, electrolysis, extraction of aluminium and electroplating.
No tags specified
gcse
aqa
chemistry 2
chemistry unit 2
c2
salts
electrolysis
chemistry
science
chemical industries
chemistry
chemistry 2
gcse
Mind Map by
Lilac Potato
, updated more than 1 year ago
More
Less
Created by
Lilac Potato
over 8 years ago
1502
78
0
Resource summary
GCSE AQA Chemistry 2 Salts & Electrolysis
Acids & Alkalis
Acid: substance with pH less than 7, form H+ ions in water
Base: substance with pH greater than 7
Alkali: base that dissolves in water, form OH- ions in water
Neutralisation: acid + base --> salt + water
Acids & metals
Acid + metal (oxide/hydroxide) --> salt + hydrogen
Ammonia
Dissolves in water --> alkaline solution
Ammonia + Nitric acid --> Ammonium nitrate
Ammonium nitrate - good fertiliser, has nitrogen from 2 sources, plants need nitrogen to make proteins
Making salts
Making soluble salts using a metal/insoluble base
Filter out excess, evaporate & crystallise
Making soluble salts using an alkali
Neutralise, repeat to remove indicator, evaporate & cystallise
Making insoluble salts - precipitation reactions
Filter salt out, wash & dry
Electrolysis
Splitting up with electricity - requires electrolyte
Contains free electrons - conduct electricity
Needs flow of electrons, electrons taken away at +ve electrode & given to other ions at -ve electrode
Oxidation & reduction
Oxidation Is Loss of electrons
Reduction Is Gain of electrons
Reactivity affects products formed
At -ve electrode - if metal ions & H+ ions present, metal ions will stay in solution if metal is more reactive than hydrogen - keener to stay as ions
At +ve electrode - if OH- & halide ions are present, molecules of chlorine formed, if no halide, oxygen formed
Electrolysis of Sodium Chloride solution produces...
Hydrogen
Chlorine
Bleach & plastics
Sodium hydroxide
Soap
Extraction of aluminium
Cryolite lowers temp, & costs
Electrodes made of carbon - CO2 - 'eaten away'
Aluminium forms at -ve electrode Oxygen forms at +ve electrode
Electroplating
At -ve electrode - metal object you want to plate
At +ve electrode - pure metal
Show full summary
Hide full summary
Want to create your own
Mind Maps
for
free
with GoConqr?
Learn more
.
Similar
GCSE - AQA: C1.1 The Fundamental Ideas in Chemistry
Olly Okeniyi
GCSE AQA Chemistry 1 Fuels & The Environment
Lilac Potato
Testing for ions
Joshua Rees
Flame tests
Joshua Rees
Tests for Positive Ions: Flame Test Colours
bella.mort
Test for positive ions
bella.mort
Making Salts Flow Chart
Joanna van Dyk
exothermic and endothermic reactions
janey.efen
GCSE Core Chemistry Yr 9
bronwyn831
CHEMISTRY TEST
kingi kigongo
Metal Oxides, Metal Hydroxides & Ammonia
Tom Johnson
Browse Library