Extracting Metals 1

Extracting Metals 1

intro lesson with 11Y1

Poll

What is the first thing we need to consider if we are looking at metal extraction?

• Enthalpy diagrams

• Reversibility of reactions

• Reactivity series

• Rates of reaction

Multiple Choice

Which answer is not the reason why cathode is located at the bottom of the electrolytic cell?

• so that the bubbles produced will not be trapped in the molten aluminium

• so that molten aluminium can be collected easily

• to prevent oxygen contact with molten aluminium

• because it is easier to attract heavier ions at the bottom

Multiple Choice

Which element cannot be extracted from its ore by reduction with carbon?

• iron
• aluminium
• copper
• lead

Multiple Choice

In aluminum extraction the electrodes are made of

• carbon (graphite)

• aluminum and oxygen

• platinum

Multiple Choice

The positive electrode is called the

• anode

• cathode

Multiple Choice

Which is not a reason that cryolite is used in aluminum extraction?

• Cryolite dissolves aluminum oxide

• Cryolite reduces the melting point of aluminum oxide

• Cryolite decreases the cost of aluminum extraction

• Cryolite removes impurities from aluminum oxide

Multiple Choice

What is the name of the ore that contains aluminum

• Bauxite

• Cryolite

• Aluminum oxide

Multiple Choice

Which of these is a native metal?

• Gold (Au)

• Potassium (K)

• Iron (Fe)

• Tin (Sn)

Multiple Choice

Which of these are correct, balanced equations for the extraction of a metal

• CuO + C -> CO₂ + Cu

• 2CuO + 2C -> CO₂ + Cu

• 2CuO + C -> CO₂ + Cu

• 2CuO + C -> CO₂ + 2Cu

Multiple Select

Which of these metals can be extracted from ores using carbon:

• Iron

• Tin

• Potassium

• Copper

• Calcium

Multiple Choice

What else (other than metal) is produced when a metal oxide is reacted with carbon?

• Carbon dioxide

• Carbon trioxide

• Nitrogen oxide

• Carbonic acid

Multiple Choice

What term defines "A metal that is found unbonded to anything"

• Ore

• Native

• Oxide

• Carbonate

Multiple Choice

What term defines "A metal bonded to something else in a high enough quantity to make it worth extracting"

• Ore

• Native

• Oxide

• Carbonate

Multiple Choice

What element is used to extract less reactive metals?

• Carbon

• Nitrogen

• Oxygen

• Boron