Topic 3- Acids And Bases Flashcards
How can you neutralise your stomach acid?
Eat an antacid
What is chlorine used for?
Killing bacteria in water
Makes house hold bleach
Makes plastics such as polyvinyl chloride (PVC)
Define the word ‘neutralise’
A reaction between an acid and a base
Why does your stomach produce acid?
Breaks down food
Kills bacteria
What is the last part when a base reacts with the following acid:
Nitric acid
Nitrate
NO3
What is the last part when a base reacts with the following acid:
Sulphuric acid
Sulphate
SO4
What is the last part when a base reacts with the following acid:
Hydrochloric acid
Chloride
Cl
What is the acronym to remember a neutralisation reaction with oxide(O) and hydroxide(OH) and what does it stand for
BASH
Base + Acid = Salt + Water
Copper Oxide + Nitric Acid = Copper Nitrate + Water
What are the 2 bases?
Oxide- O
Hydroxide- OH
What is the acronym to remember a neutralisation reaction with carbonate(CO3) and what does it stand for?
CASHOCO
Carbonate + Acid = Salt + Water + carbon dioxide
Calcium carbonate + Hydrochloric acid = Calcium chloride + H20 + CO2
What is the test for chlorine gas?
Damp blue litmus paper turns red, then bleaches white
What is the test for hydrogen gas?
Light a splint under a test tube, if their is hydrogen, you will hear a squeaky pop
What are polymers?
Polymers are very large molecules made when many smaller molecules join together, end to end. The smaller molecules are called monomers.
If you are asked about polymers, which one should you state?
Poly(Chloroethene) or PVC
What is a precipitate?
A solid
What is meant by unsaturated?
Contains a multiple bond
What is the test for carbon dioxide?
Limewater goes cloudy or milky
What is the test for oxygen?
A glowing wooden splint relights in a test tube of oxygen
Explain why calcium carbonate can be used to treat waste gases produced in coal-fired power stations.
Remove waste gases that are acidic
Contain sulphur dioxide
Produced from sulphur impurities in coal
Calcium carbonate neutralises gases
Explain why calcium carbonate can be used to treat waste gases produced in coal-fired power stations.
Remove waste gases that are acidic
Contain sulphur dioxide
Produced from sulphur impurities in coal
Calcium carbonate neutralises gases as it is a base
Describe what you would observe when water is added, one drop at a time, to
cold calcium oxide
Fizzing/hissing
Solid crumbles to a powder
What is the symbol of Hydrochloric acid?
HCl
What is the symbol of Sulphuric acid?
H SO
2 4
What is the symbol of Nitric acid?
HNO
3
What colour is chlorine gas?
Pale green
