i) Hygroscopy
ii) Deliquescence
iii) Efflorescence// Efflorescent
johnmulu answered the question on February 10, 2017 at 13:21
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Explain the following observation. A chloride dissolves in water to form an electrolyte while the same chloride dissolves in methylbenzene to form a non-electrolyte
(Solved)
Explain the following observation. A chloride dissolves in water to form an electrolyte while the same chloride dissolves in methylbenzene to form a non-electrolyte
Date posted:
February 10, 2017
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Answers (1)
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During an experiment, chlorine gas was bubbled into a solution of potassium iodide (a) State the observations made
(Solved)
During an experiment, chlorine gas was bubbled into a solution of potassium iodide
a) State the observations made
b) Using an ionic equation, explain why the reaction is redox.
Date posted:
February 10, 2017
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Answers (1)
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State and explain what would happen if a dry red litmus paper was dropped in a gas jar dry chlorine
(Solved)
State and explain what would happen if a dry red litmus paper was dropped in a gas jar dry chlorine.
Date posted:
February 10, 2017
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Answers (1)
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By using only dilute hydrochloric acid, describe how a student would distinguish between barium sulphite from barium sulphate
(Solved)
By using only dilute hydrochloric acid, describe how a student would distinguish between barium sulphite from barium sulphate
Date posted:
February 10, 2017
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Answers (1)
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State and explain what would happen if a dry litmus paper was dropped in a gas jar of chlorine
(Solved)
State and explain what would happen if a dry litmus paper was dropped in a gas jar of chlorine
Date posted:
February 10, 2017
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Answers (1)
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Two reagents that can be used to prepare chlorine gas are manganese (IV) oxide and concentrated hydrochloric acid
(Solved)
Two reagents that can be used to prepare chlorine gas are manganese (IV) oxide and concentrated hydrochloric acid
i) Write an equation for the reaction
ii) Give the formula of another reagent that can be reacted with concentrated hydrochloric acid to produce chlorine gas
iii) Describe how the chlorine gas could be dried in the laboratory
Date posted:
February 10, 2017
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Answers (1)
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State and explain the observations made when excess ammonia gas reacts with chlorine
(Solved)
State and explain the observations made when excess ammonia gas reacts with chlorine
Date posted:
February 10, 2017
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Answers (1)
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Name the process which takes place when: (a) Solid carbon (IV) oxide (dry ice) changes directly into gas
(Solved)
Name the process which takes place when:
a) Solid carbon (IV) oxide (dry ice) changes directly into gas
b) A red litmus paper turns white when dropped into chlorine water.
c) Propene gas molecules are converted into a giant molecule
Date posted:
February 10, 2017
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Answers (1)
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The reaction between hot concentrated sodium hydroxide and chlorine produces sodium chlorate (V), sodium chloride and water.
(Solved)
The reaction between hot concentrated sodium hydroxide and chlorine produces sodium chlorate (V), sodium chloride and water.
a) Write the equation for the reaction
b) Give one use of sodium chlorate (V)
Date posted:
February 10, 2017
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Answers (1)
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Calcium oxide can be used to dry ammonia gas (a) Explain why calcium oxide is not used to dry hydrogen chloride gas
(Solved)
Calcium oxide can be used to dry ammonia gas.
(a) Explain why calcium oxide is not used to dry hydrogen chloride gas
(b) Name one drying agent for hydrogen chloride gas
Date posted:
February 10, 2017
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Answers (1)
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The following two tests were carried out on chlorine water contained in two test-tubes
(Solved)
The following two tests were carried out on chlorine water contained in two test-tubes:
a) A piece of blue flower was dropped into the first test-tube. Explain why the flower ached.
b) The second test-tube was corked and exposed to sunlight. After a few days, it was found to contain a gas that rekindled a glowing splint. Write an equation for the reaction which produced theas.
Date posted:
February 10, 2017
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Answers (1)
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A sample of hydrogen chlorine was dissolved in water to make 250 cm3 of solution 25 cm3 of the solution required
(Solved)
A sample of hydrogen chlorine was dissolved in water to make 250 cm3 of solution 25 cm3 of the solution required 46 cm3 of 11.0 M sodium hydroxide for complete neutralization
i) Calculate the number of moles of hydrochloric acid in 25 cm3 of solution
ii) Determine the mass of hydrogen chloride that was dissolved to make 250 cm3 of solution (Cl = 35.5, H = 1.0)
Date posted:
February 7, 2017
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Answers (1)
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In an experiment, sulphur (IV) oxide was dissolved in water to form solution L. (i) What would be observed if a few drops of barium nitrate solution were immediately added to solution L?
(Solved)
In an experiment, sulphur (IV) oxide was dissolved in water to form solution L.
i) What would be observed if a few drops of barium nitrate solution were immediately added to solution L?
ii) Write an ionic equation for the reaction that occurred between solution L and aqueous barium nitrate in (i) above.
Date posted:
February 7, 2017
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Answers (1)
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What would be observed if sulphur (IV) oxide is bubbled through acidified potassium manganate (VII)?
(Solved)
What would be observed if sulphur (IV) oxide is bubbled through acidified potassium manganate (VII)?
Date posted:
February 7, 2017
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Answers (1)
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Name two reagents that can be used to prepare hydrogen sulphide in the laboratory
(Solved)
Name two reagents that can be used to prepare hydrogen sulphide in the laboratory
Date posted:
February 7, 2017
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Answers (1)
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State the observation made at the end of the experiment when a mixture of iron powder and sulphur is heated in a test tube
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a) State the observation made at the end of the experiment when a mixture of iron powder and sulphur is heated in a test tube
b) When a mixture of iron powder and sulphur is heated, it glows more brightly than that of iron fillings and sulphur. Explain this observation
Date posted:
February 7, 2017
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Answers (1)
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When hydrogen sulphide gas was bubbled into an aqueous solution of iron (III) chloride, a yellow precipitate was deposited.
(Solved)
When hydrogen sulphide gas was bubbled into an aqueous solution of iron (III) chloride, a yellow precipitate was deposited.
a) State another observation made
b) Write an equation for the reaction that took place
c) What type reaction was undergone by hydrogen sulphide in this reaction?
Date posted:
February 7, 2017
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Answers (1)
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In an experiment to study the properties of concentrated sulphuric (IV) acid, a mixture of the acid and wood charcoal was heated in a boiling tube
(Solved)
In an experiment to study the properties of concentrated sulphuric (IV) acid, a mixture of the acid and wood charcoal was heated in a boiling tube.
a) Write the equation of the reaction that took place in the boiling tube
b) Using oxidation numbers, show that reduction and oxidation reactions took place in the boiling tube.
Date posted:
February 7, 2017
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Answers (1)
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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)