i) A yellow deposit of sulphur and a colourless liquid are formed. Hydrogen sulphide reduces sulphur (IV) oxide to sulphur which is yellow
ii) The experiment should be performed in a fume chamber as both the reactants are poisonous
johnmulu answered the question on February 7, 2017 at 08:32
- Oleum (H2S2O7)is an intermediate product in the industrial manufacture of sulphuric acid(Solved)
Oleum (H2S2O7)is an intermediate product in the industrial manufacture of sulphuric acid.
a) How is oleum converted into sulphuric (VI) acid
b) Give one use of sulphuric (VI) acid
Date posted: February 7, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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When a sample of concentrated sulphuric (IV) acid was left in an open beaker in a room for two days, the volume was found to have increased slightly.
a) What property of concentrated sulphuric (IV) acid is shown by the above reaction
b) State one use of concentrated sulphuric (IV) acid that depends on the property named
Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. 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. On further heating, the liquid darkens and does not flow easily. Explain these observations.
Date posted: February 6, 2017. Answers (1)
- 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. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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State what would be observed when dilute hydrochloric acid is added to the products formed when a mixture of iron filling and sulphur is heated.
Date posted: February 6, 2017. 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. 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. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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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. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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The use of materials made of lead in roofing and in water pipes is being discouraged. State:
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ii) One reason why their use is being discouraged
Date posted: February 6, 2017. Answers (1)