Скачать или смотреть GCSE Chemistry - Separating Metals from Metal Oxides | Extraction of Metals & Reduction

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** WHAT'S COVERED **
1. Oxidation and Reduction
Oxidation is defined as the process of gaining oxygen.
Reduction is defined as the process of losing oxygen.
2. Why metals are found as oxides
Most metals are reactive and will oxidise when they come into contact with oxygen in the atmosphere.
Unreactive metals, such as gold, do not react with oxygen and can be found as pure metals.
3. Reducing metal oxides with carbon
Metal oxides can be reacted with carbon to remove the oxygen, leaving a pure metal and carbon dioxide.
This process is a redox reaction where the metal is reduced and the carbon is oxidised.
4. The reactivity series and extraction methods
Carbon can only reduce oxides of metals that are less reactive than carbon itself (e.g., zinc, iron, copper).
Metals that are more reactive than carbon must be extracted using electrolysis, which is a more expensive process.
5. Extracting iron from iron ore
A real-world example of reducing a metal oxide with carbon to extract a pure metal.
The balanced chemical equation for the reduction of iron oxide with carbon is shown.

** CHAPTERS **
0:00 Oxidation and Reduction
0:49 Why Metals Form Oxides
1:58 Reducing Metal Oxides with Carbon
2:30 The Reactivity Series
3:06 Extracting Iron from its Ore

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