sodium hydroxide solution is used to remove carbon (iv) oxide gas
mwendwamutindi answered the question on November 7, 2017 at 07:00
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Give a reason why it is preferred to use warm water to cold water when collecting oxygen gas
(Solved)
Give a reason why it is preferred to use warm water to cold water when collecting oxygen gas
Date posted:
November 5, 2017
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Answers (1)
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State the observation made when hydrogen sulphide gas is bubbled through aqueous lead (II) nitrate solution
(Solved)
1.(a) State the observation made when hydrogen sulphide gas is bubbled through aqueous lead (II) nitrate solution.
(b) Write an ionic equation for the reaction above.
Date posted:
November 5, 2017
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Answers (1)
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Explain why the ability of temporary hard water to conduct electricity falls when water is boiled, but it does not fall when temporary hardness is removed...
(Solved)
Explain why the ability of temporary hard water to conduct electricity falls when water is boiled, but it does not fall when temporary hardness is removed by addition of washing soda
Date posted:
November 5, 2017
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Answers (1)
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The melting point of phosphorous trichloride is -91°C while that of sodium chloride is 801°C. In terms of structure and bonding explain the difference in...
(Solved)
The melting point of phosphorous trichloride is -91°C while that of sodium chloride is 801°C. In terms of structure and bonding explain the difference in the melting point
Date posted:
November 5, 2017
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Answers (1)
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Describe how a solid sample of barium sulphate can be prepared starting with copper (II) oxide
(Solved)
Describe how a solid sample of barium sulphate can be prepared starting with copper (II) oxide
Date posted:
November 5, 2017
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Answers (1)
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Explain why the second ionization energy is higher than the first ionization energy
(Solved)
Explain why the second ionization energy is higher than the first ionization energy
Date posted:
November 5, 2017
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Answers (1)
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A mixture contains ammonium chloride, silver chloride and lead (II) chloride. Describe how each of the substance can be obtained from the mixture
(Solved)
A mixture contains ammonium chloride, silver chloride and lead (II) chloride. Describe how each of the substance can be obtained from the mixture
Date posted:
November 5, 2017
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Answers (1)
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Name one reagent that can be used to distinguish between Al3+ and Zn2+ ions in solution and state what would be observed if each of...
(Solved)
Name one reagent that can be used to distinguish between Al3+ and Zn2+ ions in solution and state what would be observed if each of the ions is treated with the reagent you have named.
Date posted:
November 4, 2017
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Answers (1)
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Flower extracts are often used as indicators in the laboratory. State one disadvantage of using flower extracts as indicators
(Solved)
Flower extracts are often used as indicators in the laboratory. State one disadvantage of using flower extracts as indicators
Date posted:
November 4, 2017
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Answers (1)
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Explain the effect of the by-product of roasting process of zinc ores on the environment
(Solved)
Explain the effect of the by-product of roasting process of zinc ores on the environment
Date posted:
November 4, 2017
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Answers (1)
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State and explain the observation made when coloured flowers are placed into a gas jar full of chlorine gas
(Solved)
State and explain the observation made when coloured flowers are placed into a gas jar full of chlorine gas
Date posted:
November 4, 2017
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Answers (1)
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State and explain the observations made when concentrated nitric (V) acid is added to copper turnings
(Solved)
State and explain the observations made when concentrated nitric (V) acid is added to copper turnings
Date posted:
November 4, 2017
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Answers (1)
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A student was asked to determine the percentage of zinc metal in a mixture of zinc metal and zinc oxide. He reacted the mixture with...
(Solved)
A student was asked to determine the percentage of zinc metal in a mixture of zinc metal and zinc oxide. He reacted the mixture with excess hydrochloric acid and accurately collected the gas evolved, which was then used to calculate the amount of zinc in the mixture.
(a) Name the gas that was evolved
(b) Apart from the reaction liberating the gas write a balanced equation for the other reaction that took place.
(c) Why would dilute nitric acid not suitable for this reaction?
Date posted:
November 4, 2017
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Answers (1)
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Give the agencies of the cation and onion in each of the following compounds. (1)Zinc sulphate (2)Magnesium carbonate (3)Aluminium nitrate
(Solved)
Give the agencies of the cation and onion in each of the following compounds.
1)Zinc sulphate
2)magnesium carbonate
3)Aluminium nitrate
Date posted:
November 4, 2017
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Answers (1)
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Using acidified potassium dichromate (VI) solution, describe how you would differentiate between sulphur (IV) oxide and hydrogen sulphide
(Solved)
Using acidified potassium dichromate (VI) solution, describe how you would differentiate between sulphur (IV) oxide and hydrogen sulphide
Date posted:
November 3, 2017
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Answers (1)
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Describe how sodium sulphate crystals can be prepared starting with 50cm3
of 2M sodium hydroxide and 1M sulphuric
(VI) acid
(Solved)
Describe how sodium sulphate crystals can be prepared starting with 50cm3
of 2M sodium hydroxide and 1M sulphuric
(VI) acid
Date posted:
November 3, 2017
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Answers (1)
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Explain why Aluminium is better conductor of electricity than magnesium
(Solved)
Explain why Aluminium is better conductor of electricity than magnesium
Date posted:
November 3, 2017
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Answers (1)
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Name one piece apparatus used to measure volume of gases
(Solved)
Name one piece apparatus used to measure volume of gases
Date posted:
November 3, 2017
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Answers (1)
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Explain why solid Carbon (IV) oxide is preferred over ordinary ice for use by ice cream vendors
(Solved)
Explain why solid Carbon (IV) oxide is preferred over ordinary ice for use by ice cream vendors
Date posted:
November 3, 2017
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Answers (1)
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A piece of burning magnesium was lowered into a gas jar containing nitrogen oxide. State and explain the observations made
-Write an equation for the reaction...
(Solved)
A piece of burning magnesium was lowered into a gas jar containing nitrogen oxide. State and explain the observations made
-Write an equation for the reaction above.
Date posted:
November 3, 2017
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Answers (1)