C(s) + 2H2SO4(aq) $\rightarrow$ 2H2O + 2SO2(g) + CO2(g)
johnmulu answered the question on February 7, 2017 at 08:36
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In an experiment, a gas jar containing moist sulphur (IV) oxide was inverted over another gas jar containing hydrogen sulphide gas.
(Solved)
In an experiment, a gas jar containing moist sulphur (IV) oxide was inverted over another gas jar containing hydrogen sulphide gas.
a) state and explain the observation that was made
b) state the precaution that should be taken when carrying out this experiment
Date posted:
February 7, 2017
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Answers (1)
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In an experiment, sulphur (IV) oxide gas was bubbled into water followed by chlorine gas. The resulting clear solution gave a white precipitate when mixed with acidified barium chloride solution
(Solved)
In an experiment, sulphur (IV) oxide gas was bubbled into water followed by chlorine gas. The resulting clear solution gave a white precipitate when mixed with acidified barium chloride solution. Explain these observations.
Date posted:
February 6, 2017
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Answers (1)
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Describe a simple laboratory experiment that can be used to distinguish between sodium sulphide and sodium carbonate
(Solved)
Describe a simple laboratory experiment that can be used to distinguish between sodium sulphide and sodium carbonate.
Date posted:
February 6, 2017
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Answers (1)
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A certain matchstick head contains potassium chlorate and sulphur. On striking, the two subtances react to produce sulphur (IV) oxide and potassium chloride
(Solved)
A certain matchstick head contains potassium chlorate and sulphur. On striking, the two subtances react to produce sulphur (IV) oxide and potassium chloride. Explain the environmental effect of using such matches in large numbers.
Date posted:
February 6, 2017
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Answers (1)
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When a solid sample of sulphur is heated in a test tube, it changes into a liquid which flows easily
(Solved)
When a solid sample of sulphur is heated in a test tube, it changes into a liquid which flows easily. On further heating, the liquid darkens and does not flow easily. Explain these observations.
Date posted:
February 6, 2017
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Answers (1)
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In an attempt to prepare sulphur (IV) oxide gas, dilute sulphuric (VI) acid was reacted with barium sulphite
(Solved)
In an attempt to prepare sulphur (IV) oxide gas, dilute sulphuric (VI) acid was reacted with barium sulphite. The yield of sulphur (IV) oxide was found to be negligible. Explain
Date posted:
February 6, 2017
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Answers (1)
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On heating a pale green solid K, carbon (IV) oxide gas and black solid M were formed. On reacting K with dilute hydrochloric acid, carbon (IV) oxide gas and green solution S were formed
(Solved)
On heating a pale green solid K, carbon (IV) oxide gas and black solid M were formed. On reacting K with dilute hydrochloric acid, carbon (IV) oxide gas and green solution S were formed. When excess aqueous ammonia was added to solution S, a deep blue solution was formed.
a) Identify the cation in solid K
b) Identify the two anions in solution S
Date posted:
February 6, 2017
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Answers (1)
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Describe how formation of nitrogen (II) oxide in the internal combustion engine leads to gaseous pollution
(Solved)
Describe how formation of nitrogen (II) oxide in the internal combustion engine leads to gaseous pollution.
Date posted:
February 6, 2017
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Answers (1)
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Give a reason why nitrogen (II) oxide is not formed at room temperature
(Solved)
Give a reason why nitrogen (II) oxide is not formed at room temperature.
Date posted:
February 6, 2017
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Answers (1)
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Describe the process by which Nitrogen is obtained from air on a large scale
(Solved)
Describe the process by which Nitrogen is obtained from air on a large scale.
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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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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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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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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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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What condition could cause a poisonous gas to be formed when kerosene is burnt?
(Solved)
What condition could cause a poisonous gas to be formed when kerosene is burnt? Explain
Date posted:
February 3, 2017
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Answers (1)
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Describe how solid sample of potassium sulphate can be prepared starting with 200 cm3 of 2M potassium hydroxide
(Solved)
Describe how solid sample of potassium sulphate can be prepared starting with 200 cm3 of 2M potassium hydroxide.
Date posted:
February 3, 2017
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Answers (1)
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State the Gay Lussac’s Law
(Solved)
Start the Gay Lussac’s Law.
Date posted:
February 3, 2017
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Answers (1)
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Describe how a sample of pure sodium sulphate crystals can be prepared
(Solved)
Starting with 50 cm 3 of 2.8 M sodium hydroxide, describe how a sample of pure sodium sulphate crystals can be prepared.
Date posted:
February 3, 2017
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Answers (1)