Salts and Electrolysis
- Created by: Chloe-Manning
- Created on: 26-09-16 16:24
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- Salts and electrolysis
- Acids and Alkalis
- Acid 1-6
- H+ cations
- Alkali 8-14
- OH- anions
- Neutral 7
- Acid 1-6
- Making a soluble salt (copper sulphate)
- 1) 1 spatula of copper oxide to 25cm of sulphuric acid
- 2) stir whilst warming must be excess powder
- 3) filter excess CuO out
- 4) heat copper sulphate solution
- 5) put in an evaporating basin and leave at room temperature
- Making an insoluble salt
- 1) mix 25cm of magnesium sulphate and 25cm of sodium carbonate
- 2) filter the mixture keep the residue
- 3) rinse residue with distilled water
- 4) leave to dry
- Electrolysis
- Molten
- Simple split
- Metal - catode
- Non-metal + anode
- Solution
- Negative electrode the most reactive stays
- Positive electrode halagon leaves if none will be oxygen
- Molten
- Aluminium Extraction
- Ore: bauxite
- Croyolite lowers melting point
- Forms at Negative electrode
- Oxygen reacts with the electrode
- Electroplating
- depositing a thin layer of a metal on an object through electrolysis
- Colourful electrolysis
- Electrolysis of brine
- Positive electrode
- colourless & red
- Chlorine (bleach)
- Negative electrode
- Blue
- Hydrogen
- Acids and Alkalis
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