Add dilute hydrochloric acid to the mixture
Filter to obtain copper turnings residue, wash and dry the residue
john3 answered the question on November 3, 2017 at 07:06
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Differentiate between Oxidation number and valency
(Solved)
A form two topical question (Atoms,Chemical reactions and formula)
Date posted:
October 26, 2017
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Answers (1)
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Why is it always advisable to scoop chemicals substance using a clean spatula?
(Solved)
Why is it always advisable to scoop chemicals substance using a clean spatula?
Date posted:
October 25, 2017
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Answers (1)
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Explain why molten calcium chloride and magnesium chloride conduct electricity while carbon tetrachloride and silicon tetrachloride do not
(Solved)
Explain why molten calcium chloride and magnesium chloride conduct electricity while carbon tetrachloride and silicon tetrachloride do not
Date posted:
October 25, 2017
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Answers (1)
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Define allotropy.
(Solved)
Define allotropy.
Date posted:
October 19, 2017
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Answers (1)
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Write a well balanced chemical equation to show the reaction between Magnesium and dilute Sulphuric acid
(Solved)
Write a well balanced chemical equation to show the reaction between Magnesium and dilute Sulphuric acid
Date posted:
October 11, 2017
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Answers (1)
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Describe the non-luminous flame of Bunsen burner and give a reason why it is preferred when heating substances in laboratory
(Solved)
Describe the non-luminous flame of Bunsen burner and give a reason why it is preferred when heating substances in laboratory
Date posted:
October 8, 2017
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Answers (1)
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You are provided with the following :copper turning,dilute sulphuric acid and a source of heat. Describe fully how you would prepare copper (ii) sulphate crystals
(Solved)
You are provided with the following :copper turning,dilute sulphuric acid and a source of heat. Describe fully how you would prepare copper (ii) sulphate crystals
Date posted:
October 6, 2017
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Answers (1)
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When lead nitrate and sodium sulphate react, a white precipitate is formed. (i)Identify the white precipitate.(ii) Write an ionic equation of the reaction
(Solved)
When lead nitrate and sodium sulphate react, a white precipitate is formed. (i)Identify the white precipitate.(ii) Write an ionic equation of the reaction
Date posted:
October 5, 2017
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Answers (1)
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Starting with copper metal, describe how you can prepare solid copper (ii) carbonate
(Solved)
Starting with copper metal, describe how you can prepare solid copper (ii) carbonate
Date posted:
October 5, 2017
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Answers (1)
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Element M reacts with water at room temperature to produce 0.2 dm3 of gas. Determine the mass of M which was...
(Solved)
Element M reacts with water at room temperature to produce 0.2 dm3 of gas. Determine the mass of M which was reacted with water. (Molar gas volume at room temperature is 24 dm3, Relative atomic mass of M = 7).
Date posted:
October 4, 2017
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Answers (1)
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A solution was made by dissolving 8.2g of calcium nitrate to give 2 litres of solution. (Ca = 40.0; N = 14.0;...
(Solved)
A solution was made by dissolving 8.2g of calcium nitrate to give 2 litres of solution. (Ca = 40.0; N = 14.0; O = 16.0).
Determine the concentration of nitrate ions in moles per litre
Date posted:
October 4, 2017
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Answers (1)
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When 15cm3 of a gaseous hydrocarbon, P, was burnt in 100cm3 of oxygen, the resulting gaseous mixture occupied 70cm3 at room temperature and pressure....
(Solved)
When 15cm^3 of a gaseous hydrocarbon, P, was burnt in 100cm^3 of oxygen, the resulting gaseous mixture occupied 70cm^3 at room temperature and pressure. When the gaseous mixture was passed through potassium hydroxide solution, its volume decreased to 25cm^3.
(a) What volume of oxygen was used during the reaction?
Date posted:
October 4, 2017
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Answers (1)
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A certain mass of gas occupies 146 dm^3 at 291 K and 98.31 kPa. What will be...
(Solved)
A certain mass of gas occupies 146 dm^3 at 291 K and 98.31 kPa. What will be its temperature if its volume is reduced to 133 dm^3 at 101.325 kPa?
Date posted:
October 4, 2017
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Answers (1)
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Give a reason why nitric (V) acid is stored in dark brown bottles.
(Solved)
Give a reason why nitric (V) acid is stored in dark brown bottles.
Date posted:
September 30, 2017
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Answers (1)
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Name the following processes (i) When anhydrous calcium chloride was left in an open beaker overnight a solution was formed (ii) When sodium carbonate decahydrate crystals are...
(Solved)
Name the following processes
i) When anhydrous calcium chloride was left in an open beaker
overnight a solution was formed.
ii) When sodium carbonate decahydrate crystals are left in an open beaker for some days it turned
into powder.
Date posted:
September 28, 2017
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Answers (1)
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Briefly explain how the calcium is separated from sodium in the down’s cell.
(Solved)
Briefly explain how the calcium is separated from sodium in the down’s cell.
Date posted:
September 28, 2017
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Answers (1)
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List and explain the physical properties of Sulphur
(Solved)
List and explain the physical properties of Sulphur
Date posted:
September 27, 2017
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Answers (1)
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Name the two allotropes of sulphur
(Solved)
Name the two allotropes of sulphur
Date posted:
September 26, 2017
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Answers (1)
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Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?
(Solved)
Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?
Date posted:
September 26, 2017
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Answers (1)
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List five substances that undergo sublimation?
(Solved)
List five substances that undergo sublimation?
Date posted:
September 26, 2017
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Answers (1)