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What is the difference between liquid-liquid extraction and ion exchange?
Date posted:
January 19, 2018
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What is experimental research?
Date posted:
January 18, 2018
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What are the sources of heat in laboratory?
Date posted:
January 8, 2018
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What is the role of chemistry in society?
Date posted:
January 8, 2018
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Differentiate between conductors and non-conductors.
Date posted:
January 8, 2018
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(i) What is a mixture (ii) Give various ways used to separate a mixture
Date posted:
January 8, 2018
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Explain why factories use alot of energy as heat energy to obtain nitrogen while root nodules obtain in room temperature.
Date posted:
January 7, 2018
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What is the chemical name of perspex?
Date posted:
January 4, 2018
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A hydrated salt has the following composition by mass. Iron 20.2%, Oxygen 23.0%, Sulphur 11.5%, Water 45.3%. Its relative formula mass is 278. Determine the formula of hydrated salt
Date posted:
December 31, 2017
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Which is the best method to separate sodium chloride from a solution of potassium chloride and sodium chloride mixture?
Date posted:
December 30, 2017
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What is a burette?
Date posted:
December 28, 2017
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State and explain what is observed when a burning piece of magnesium is lowered into a gas jar containing dry chlorine gas
Date posted:
December 26, 2017
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What is a compound?
Date posted:
December 23, 2017
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What is an element?
Date posted:
December 23, 2017
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Give the observations made when lead (ii)nitrate is heated strongly and write a balanced chemical equations to show the action
Date posted:
December 21, 2017
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Carbon and silicon are in the same group of the periodic table. Silicon (iv) oxide melts at 2440°c while solid carbon (iv) oxide sublimes at -70°c. In terms of structure and bonding, explain this difference.
Date posted:
December 21, 2017
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Distinguish between a covalent and dative bond
Date posted:
December 21, 2017
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Given a mixture of iron (ii) oxide ammonium chloride sodium chloride and lead(ii) chloride, describe how this mixture can be separated to obtain a sample of each.
Date posted:
December 21, 2017
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What is bleaching?
Date posted:
December 20, 2017
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What is the equation for the reaction between aluminum oxide and hydrochloric acid?
Date posted:
December 19, 2017
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Describe how a double aqueous ammonium ii sulphate can be prepared using the following reagents: aqueous ammonia, dilute sulphuric acid and iron metal.
Date posted:
December 18, 2017
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Explain why the solution of ethane in water does not show acidic properties while that of hydrochloric acid shows.
Date posted:
December 18, 2017
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Explain how to test for the purity of a liquid
Date posted:
December 18, 2017
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State and explain the observation that would be made when hydrogen chloride gas is bubbled into a solution of silver nitrate.
Date posted:
December 17, 2017
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What is chemistry?
Date posted:
December 13, 2017
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Between methanol and propanol, which has a higher boiling point?
Date posted:
December 13, 2017
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Give equations for preparation of lead chloride from lead carbonate
Date posted:
December 13, 2017
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Explain what is observed when carbon (IV) is bubbled through calcium hydroxide solution.
Date posted:
December 11, 2017
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Write the following abbreviation in full as used in chemistry DDT.
Date posted:
December 5, 2017
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Distinguish between the reducing property of concentrated Hydrochloric acid and concentrated Sulphuric acid.
Date posted:
December 5, 2017