Extracting Aluminium

What is the name of the ore that contains aluminum

• Bauxite

• Cryolite

• Aluminum oxide

• Heamatite

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

The positive electrode is called the

• anode

• cathode

The negative electrode is called the

• anode

• cathode

Aluminum ions are attracted to the

• anode

• cathode

Oxide ions are attracted to the

• cathode

• anode

In aluminum extraction the electrodes are made of

• carbon (graphite)

• aluminum and oxygen

• platinum

• steel

The anode has to be replaced frequently because

• The oxygen reacts with the carbon anode to form carbon dioxide

• Aluminum reacts with the carbon to form aluminum carbide

• The anode gets impurities that impact the extraction

• The anode is too hot and it will reduce their electrical conductivity

What is an ore?

• a solid metal
• a rock cantaining a metal combined with other elements
• an element
• an object used to row a boat

Tags

NGSS.MS-PS1-1

Which of these elements is unlikely to be found native?

• gold
• platinum
• aluminium
• silver