Brine (Sodium Chloride)
johnmulu answered the question on February 6, 2017 at 05:50
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When a few drops of aqueous ammonia were added to copper (II) nitrate solution, a light blue precipitate was formed
(Solved)
When a few drops of aqueous ammonia were added to copper (II) nitrate solution, a light blue precipitate was formed. On addition of more aqueous ammonia, a deep blue solution was formed. Identify the substance responsible for the:
i) Light blue precipitate
ii) Deep blue solution
Date posted:
February 6, 2017
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Answers (1)
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Give one use of nitric (V) acid
(Solved)
Give one use of nitric (V) acid.
Date posted:
February 6, 2017
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Answers (1)
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State one use of sodium hydrogen carbonate
(Solved)
State one use of sodium hydrogen carbonate.
Date posted:
February 6, 2017
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Answers (1)
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Name one suitable reagent that can be reacted with concentrated sulphuric (VI) acid to produce nitric (V) acid
(Solved)
Name one suitable reagent that can be reacted with concentrated sulphuric (VI) acid to produce nitric (V) acid.
Date posted:
February 6, 2017
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Answers (1)
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The use of materials made of lead in roofing and in water pipes is being discouraged. State:
(Solved)
The use of materials made of lead in roofing and in water pipes is being discouraged. State:
i) Two reasons why these materials have been used in the past
ii) One reason why their use is being discouraged
Date posted:
February 6, 2017
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Answers (1)
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Why is high temperature required for nitrogen to react with oxygen?
(Solved)
Explain why a high temperature is required for nitrogen to react with oxygen.
Date posted:
February 6, 2017
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Answers (1)
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Give two use of ammonia
(Solved)
Give two use of ammonia.
Date posted:
February 6, 2017
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Answers (1)
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Nitrogen (II) oxide and nitrogen (IV) oxide are some of the gases released from car exhaust pipes. State how these gases affect the environment
(Solved)
Nitrogen (II) oxide and nitrogen (IV) oxide are some of the gases released from car exhaust pipes. State how these gases affect the environment.
Date posted:
February 6, 2017
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Answers (1)
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Give reason why concentrated sulphuric (VI) acid is not used to dry ammonia gas
(Solved)
a) Give reason why concentrated sulphuric (VI) acid is not used to dry ammonia gas
b) Name one suitable drying agent for ammonia gas
Date posted:
February 6, 2017
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Answers (1)
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Concentrated nitric (V) acid was added to Iron (II) sulpahate acidified with dilute sulphuric (VI) acid the mixture heated...
(Solved)
Concentrated nitric (V) acid was added to Iron (II) sulpahate acidified with dilute sulphuric (VI) acid the mixture heated. The solution turned from pale green to yellow with evolution of brown gas. Explain these observations.
Date posted:
February 6, 2017
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Answers (1)
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Describe how nitrogen gas is obtained from the liquid air
(Solved)
Describe how nitrogen gas is obtained from the liquid air.
Date posted:
February 6, 2017
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Answers (1)
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Give reason why concentrated sulphuric (VI) acid is not used to dry ammonia gas
(Solved)
a)Give reason why concentrated sulphuric (VI) acid is not used to dry ammonia gas
b) Name one suitable drying agent for ammonia gas
Date posted:
February 3, 2017
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Answers (1)
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State and explain the observations that would be made if a sample of sulphur is heated with concentrated nitric (V) acid
(Solved)
State and explain the observations that would be made if a sample of sulphur is heated with concentrated nitric (V) acid.
Date posted:
February 3, 2017
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Answers (1)
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Why is it advisable to obtain nitrogen from air instead of from ammonia
(Solved)
Why is it advisable to obtain nitrogen from air instead of from ammonia.
Date posted:
February 3, 2017
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Answers (1)
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Ethane gas was reacted with 1 mole of bromine gas. State one observation made during this reaction
(Solved)
Ethane gas was reacted with 1 mole of bromine gas. State one observation made during this reaction.
Date posted:
February 3, 2017
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Answers (1)
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State one source of alkanes
(Solved)
State one source of alkanes.
Date posted:
February 3, 2017
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Answers (1)
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State one use of polystyrene
(Solved)
State one use of polystyrene.
Date posted:
February 3, 2017
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Answers (1)
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A group of compounds called chlorofluorocarbons have a wide range of uses but they also have harmful effects on the environment. State..
(Solved)
A group of compounds called chlorofluorocarbons have a wide range of uses but they also have harmful effects on the environment. State one
a) use of chlorofluorocarbons
b) Harmful effect of chlorofluorocarbons on the environment
Date posted:
February 3, 2017
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Answers (1)
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Name two isomers of butene
(Solved)
Name two isomers of butene.
Date posted:
February 3, 2017
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Answers (1)
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What is meant by isomerism?
(Solved)
What is meant by isomerism?
Date posted:
February 3, 2017
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Answers (1)