Extracting copper, lead and zinc

Extracting copper, lead and zinc

Multiple Choice

What reaction is used in the extraction of metals such as iron?

• replacement

• displacement

• oxidation

Multiple Choice

The source of carbon commonly used in metal extraction..

• wood

• coke

• copper

Open pg 34.

Let's discuss the answers.

10 mins to research how copper, lead and zinc are extracted.

You may use page 80-81 in your text book to research on this.

Copper

• Malachite (copper carbonate)

• over 200 degree celcius

• Copper + Carbon dioxide

• Electrolysis

Lead

• Galena (lead sulfide) + oil (because lead is dense) + water + carbon

• -

• Lead + sulfur dioxide + carbon dioxide

• Froth flottation

Zinc

• Sphalerite (zinc sulfide) + water + carbon

• -

• zinc + carbon dioxide

• froth flottation

Actual amount produced

• -the process of metal extraction is inefficient.

• theoretical amount = amount of ore x % purity

• yield = actual amount produced / theoretical amount x100%

• 
  

Open Ended

500 tonnes of zinc is produced from an ore containing 800 tonnes. Work out the yield of the process.

Homework : Q6 in Student's book pg 81.