C6.1 and C6.3
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What process must be carried out to extract a metal from its ore ?
Reduction process
What 2 methods could be used to extract metals from ores
Reduction process with Carbon Electrolysis
How do you extract Iron from its ore ?
Blast Furnace by Reduction process
What does NPK stand for?
Nitrogen phosphorus potassium
What does a deficiency of nitrogen in plants cause?
Poor root growth, yellow leaves
What does activated charcoal do?
Attracts the indicator, allowing you to filter and remove it
What is a hazard of using ammonia solution?
It releases irritating ammonia gas
What is the colour change of phenolphthalein when acid from a burette is added to alkali in a conical flask?
Pink to colourless
What is the catalyst used in the Haber process?
Iron
What is the catalyst used for contact process stage 2?
Vanadium (V) oxide V2O5
What is the intermediate compound made in stage 3 of the contact process?
Oleum H2S2O7
What is the enzyme used in the fermentation method to make ethanol?
Yeast
Why can fermentation to make ethanol not be carried out above 35 degrees?
The yeast will denature
What is the catalyst used in the hydration method of making ethanol?
Phosphoric acid
What compound is found in malachite?
Copper carbonate
What is the compound in bauxite?
Aluminium oxide
What is the compound in haematite?
Iron (III) oxide
What are the raw materials of the blast furnace?
Iron ore, coke, limestone air
What is the chemical name for slag?
Calcium silicate CaSiO3
What is the main reducing agent in the blast furnace?
Carbon monoxide
What is added to reduce the melting point of aluminium oxide during electrolysis?
Molten Cryolite
Where is the cathode in the electrolysis of aluminium oxide?
The graphite lining of the cell
Which electrode is the aluminium formed at during electrolysis of aluminium oxide?
Cathode
Which gas is released during electrolysis of aluminium oxide?
Oxygen