Electrolysis

chantel.evans10
Mind Map by chantel.evans10, updated more than 1 year ago
chantel.evans10
Created by chantel.evans10 over 5 years ago
15
0

Description

Mind Map on Electrolysis, created by chantel.evans10 on 10/21/2014.

Resource summary

Electrolysis
1 Electrolysis is the breaking down of a compound using electrical energy.
2 The electricity used comes form a d.c (direct current) source, such as a battery.
3 It requires a liquid to conduct the electricity, called the electrolyte.
4 The compound is found in the electrolyte. The compound is broken down into componant parts.
5 You can Electrolyse Hydrochloric Acid
5.1 The electrolyte is a dilute solution of Hydrochloric Acid.
5.1.1 Applying a direct current to the electrolyte causes the hydrochloric acid to decompose into its two component parts.
5.1.1.1 Hydrogen Gas
5.1.1.1.1 Testing for Hydrogen: Hydrogen makes a "squeaky pop" with a lighted splint (The sound comes from the Hydrogen burning with Oxygen in the air to form H2O.
5.1.1.2 Chlorine Gas
5.1.1.2.1 Testing for Chlorine: Chlorine bleaches damp litmus paper, turning it white. (It may turn red for a moment first through - that's because a solution of chlorine is acidic.)
6 Electrolysis of Salt produces Chlorine
6.1 Sea Water or brine (sodium chloride solution) can be decomposed by electrlysis.
6.1.1 This is a great way to make chlorine gas.
6.1.2 Chlorine gas is toxic - so this makes the manufacture of it a hazardous process.
6.1.3 There are 3 main uses of chlorine.
6.1.3.1 1. It is used to treat water supplies - it kills bacteria and other micro-organisms making the water safe to drink.
6.1.3.2 2. It is needed in the manufacture of bleach.
6.1.3.3 3. It is used to make the polymer poly(chloroethene) - PVC
7 Electrolysis of water gives you Hydrogen and Oxygen
7.1 When water is decomposed it gives two components.
7.1.1 Hydrogen Gas
7.1.1.1 Testing for Hydrogen: Hydrogen makes a "squeaky pop" with a lighted splint (The sound comes from the Hydrogen burning with Oxygen in the air to form H2O.
7.1.2 Oxygen Gas
7.1.2.1 Testing for Oxygen: You check for Oxygen by checking if the gas relights a glowing splint.
Show full summary Hide full summary

Similar

Electrolysis
lisawinkler10
AQA GCSE Chemistry Unit 2
Gabi Germain
GCSE AQA Chemistry 2 Salts & Electrolysis
Lilac Potato
GCSE Chemistry C2 topic notes
imogen.shiels
chemistry: c2
kristy baker
Chemistry Module C3: Chemicals in Our Lives - Risks & Benefits
James McConnell
Chemistry, Unit 1
greenchloe1998
Electrolysis
lmg719
Electrolysis
jroach8989
Chemistry paper 1 summary
Paige Louise
AQA Chemistry GCSE - Unit 1A - Products from Rocks
RosettaStoneDecoded