GCSE Chemistry - Extraction of Metals & Reduction #38

The video tutorial explains how metals are typically found as oxides and introduces the concepts of oxidation and reduction. Oxidation involves gaining oxygen, while reduction is the loss of oxygen. Most metals react with oxygen to form oxides, except for unreactive metals like gold. To obtain pure metals, metal oxides can be reduced using carbon, which is effective for metals less reactive than carbon. This process is demonstrated with examples like copper and iron extraction. More reactive metals require electrolysis, a costly method. The tutorial emphasizes understanding the reactivity series to determine suitable extraction methods.

What is the process called when a substance gains oxygen?

• Sublimation

• Combustion

• Oxidation

• Reduction

Which metal is known for not reacting with oxygen due to its low reactivity?

• Copper

• Iron

• Gold

• Zinc

What is the primary method used to reduce metal oxides to pure metals?

• Oxidation

• Electrolysis

• Combustion

• Reduction with carbon

Why can't highly reactive metals be reduced using carbon?

• They do not react with carbon

• They require less energy to reduce

• They form stable compounds with carbon

• They are more reactive than carbon

What is the common ore of iron that is reduced to obtain pure iron?

• FeCO3

• Fe3O4

• Fe2O3

• FeO