Mg(s) + H2SO4 -----> MgSO4 + H2
Githiari answered the question on October 11, 2017 at 14:09
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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)
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An experiment was carried out to investigate the rate of reaction shown below
Sucrose ?Fructose + Glucose ...
(Solved)
An experiment was carried out to investigate the rate of reaction shown below
Sucrose →Fructose + Glucose
For the products fructose and glucose to be formed, it was found that substance K was to be added and the temperature maintained at 370C. When another substance L was added, the reaction slowed down and eventually stopped
a) Suggest the identify of substances K and L
b) Other than temperature state three ways by which the rate of reaction could be increased
c) Explain how substance L slowed down the reaction
Date posted:
September 25, 2017
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Answers (1)
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State the uses of water in frasch process
(Solved)
State uses of water in frasch process
Date posted:
September 24, 2017
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Answers (1)
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State two chemical tests for the presence of water
(Solved)
State two chemical tests for the presence of water
Date posted:
September 19, 2017
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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.
(Solved)
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
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Answers (1)
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Name a suitable drying agent for hydrogen chloride gas
(Solved)
Name a suitable drying agent for hydrogen chloride gas
Date posted:
September 19, 2017
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Answers (1)