Extraction Flashcards
What is the process of adding oxygen called?
Oxidation
When reduction happens there’s is always ______?
Oxidation
By what method are highly reactive metals extracted ?
Electrolysis
By what method can moderately reactive metals be extracted ?
Using carbon
How do you extract iron from iron oxide?
Heat it with carbon in the form of coke which removes the oxygen to form carbon dioxide and iron. Iron oxide is REDUCED and carbon is OXIDISED
What is the process of removing oxygen called?
Reduction
Why can’t elements like aluminium and sodium be extracted by carbon?
Because they are more reactive than carbon
What process is required to make copper pure enough to be used as an electrical conductor ?
Electrolysis
Low carbon steels are _____
Easily shaped
What is brass an alloy of?
Copper and Zinc
• resistant to corrosion
What is solder and alloy of?
Lead and tin
Copper can be extracted by _______ or _________
Phytomining or bioleaching
Give 2 reasons why scrap is used to displace copper
• Iron is more reactive than copper
• Iron is cheaper than copper
(Or uses less energy than electrolysis)
Which electrode do the copper ions move towards during the electrolysis of copper sulphate solution ?
Negative electrode (cathode) because Cu is positively charged
Name the type of reaction that released energy from a fuel
Ectothermic reaction
