Chemistry C2 OCR

Frage	Antworten
What do plate movements cause?	Earthquakes and volcanoes
What process is rock recycled by?	Geological process
Why is the plate tectonic theory widely accepted now?	Evidence has been repeated and agreed
Why do scientist study volcanoes?	To try and predict future eruptions and seismic activity
What are rods used for?	Building materials
What makes an alloy?	At least one metal, but have different properties
How is copper extracted?	By reduction
How is copper purified?	By electrolysis
What can reinforce concrete?	Steel rods
What makes iron rust?	Contact with water and oxygen
What can speed up the rusting of iron?	Salt
Where are metals extracted from?	Rocks
Does aluminium have a high or low density?	Low density
Why doesn't aluminium corrode?	It has a layer of protective oxide layer
What is the equation for the haber process?	N2+3H2<>2NH3
What is ammonia used for?	Nitrogen fertilisers
What can fertilisers cause?	Eutrophication
What is the word equation for a neutralisation reaction?	Acid + base -> salt + water
What does acid react with to make salts?	Metal oxides and hydroxides, and metal carbonates
What is electrolysis used to split sodium chloride into?	Hydrogen, chlorine and sodium hydroxide
In electrolysis where do the positive ions move?	They move to the cathode
In electrolysis where do the negative ions move?	They move to the anode
How is sodium chloride mined?	From the ground or by solution mining

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