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Chemicals in our lives - risks and benefits
When an alkali neautralises an acid, what is made?
salt and water
stay in one place
What was the LeBlanc process?
a process helping to reduce pollution
a process of making alkalis on a large scale
a process of making acids on a large scale
How was the polluting gas, hydrogen chloride, usefully disposed of?
filtering the gas
by adding more acid
being oxidised to chlorine
What is added to water to make is safer to drink?
Why is chlorination of water a risk?
it produces THMs which may cause cancer
it may make the water taste bad
it may make the water look different
What is brine made up of?
sodium and chlorine
water and sodium chloride
What useful chemicals are obtained during the electrolysis of brine?
hydrochloric acid and sodium hydroxide
chlorine, sodium hydroxide and hydrogen
sodium hydroxide, chlorine and hydrochloric acid
Suggest a use of sodium hydroxide:
processing food products