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1.By using cobalt[II]chloride paper,where it turns from blue to pink showing the presence of water.
2.Using anhydrous copper II sulphate paper,where the compound turn blue showing presence of water.
MICHAELONYINKWA answered the question on September 20, 2017 at 07:59
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What is oxidation agent?
Date posted: September 19, 2017. Answers (1)
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Date posted: September 19, 2017. Answers (1)
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State two applications of radioactivity in medicine.
Date posted: September 19, 2017. Answers (1)
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Date posted: September 19, 2017. Answers (1)
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Sulphur is extracted from underground deposits by frasch process. State two physical properties of Sulphur that makes it possible to be extracted through this process.
Date posted: September 19, 2017. Answers (1)
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Name a suitable drying agent for hydrogen chloride gas
Date posted: September 19, 2017. Answers (1)
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Date posted: September 19, 2017. Answers (1)
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Define the term esterification
Date posted: September 19, 2017. Answers (1)
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Date posted: September 19, 2017. Answers (1)
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Date posted: September 18, 2017. Answers (1)
- Iron is extracted from its ore by the blast furnace process
a) Name chief ore from which iron is extracted from.
b) An ore is suspected to...(Solved)
Iron is extracted from its ore by the blast furnace process
a) Name chief ore from which iron is extracted from.
b) An ore is suspected to contain mainly iron. Describe a method that can be used to confirm the presence of iron in the ore
Date posted: September 18, 2017. Answers (1)
- Explain why hard water flowing in lead pipes may be safer for drinking than soft water
flowing in the same pipes.(Solved)
Explain why hard water flowing in lead pipes may be safer for drinking than soft water
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Date posted: September 18, 2017. Answers (1)
- In terms of structure and bonding. Explain why water (H2O) is a liquid at room temperature while Hydrogen sulphide (H2S) is a gas.(Solved)
In terms of structure and bonding. Explain why water (H2O) is a liquid at room temperature while Hydrogen sulphide (H2S) is a gas.
Date posted: September 18, 2017. Answers (1)
- In an experiment to determine the solubility in water at 300c, the following results were obtained.
Mass of empty evaporating dish = 26.2g
Mass of evaporating dish...(Solved)
In an experiment to determine the solubility in water at 300c, the following results were obtained.
Mass of empty evaporating dish = 26.2g
Mass of evaporating dish + saturated solution = 42.4g.
Mass of evaporating dish + dry solid Y = 30.4g
Use this data to calculate the solubility of Y at 300C.
Date posted: September 18, 2017. Answers (1)
- Define solubility(Solved)
Define solubility
Date posted: September 18, 2017. Answers (1)
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a) State and explain the observations made when chlorine water is exposed to light after 24 hours.
b)State one use of chlorine gas
Date posted: September 18, 2017. Answers (1)
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Highlight the steps followed when lighting a Bunsen burner
Date posted: September 18, 2017. Answers (1)
- M grammes of a radioactive isotope decayed to 5 grammes in 100 days. The half life of the
isotope is 25 days.
(a) What is meant by...(Solved)
M grammes of a radioactive isotope decayed to 5 grammes in 100 days. The half life of the
isotope is 25 days.
What is meant by half life
Date posted: September 18, 2017. Answers (1)
- A student burnt magnesium ribbon in a gas jar full of sulphur (IV) oxide gas.
(i) State two observations made in the gas jar
(ii) Write an...(Solved)
A student burnt magnesium ribbon in a gas jar full of sulphur (IV) oxide gas.
(i) State two observations made in the gas jar
(ii) Write an equation for the reaction that took place
Date posted: September 18, 2017. Answers (1)
- A student fetched water from a river in a limestone area. He used it for washing and
realized that it did not lather easily.
(i) Name the...(Solved)
A student fetched water from a river in a limestone area. He used it for washing and
realized that it did not lather easily.
(i) Name the two ions that prevent lathering
ii)Given that the structure of soap is C17H35COONa.Explain by means of ionic equations how the above ions prevent lathering
Date posted: September 18, 2017. Answers (1)