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a) Iron metal contains delocalized electrons which enable the metal to conduct electricity
b) Molten lead (II) iodide contains free ions that enable it to conduct electricity
johnmulu answered the question on February 3, 2017 at 11:56
- Charcoal is a fuel that is commonly used in cooking. When it burns it forms two oxides(Solved)
Charcoal is a fuel that is commonly used in cooking. When it burns it forms two oxides
a) Name the two oxides
b) State one use of the two oxides
Date posted: February 3, 2017. Answers (1)
- Explain why the following substances conduct an electric current(Solved)
Explain why the following substances conduct an electric current
a) Magnesium metal
b) Molten magnesium chloride
Date posted: February 3, 2017. Answers (1)
- Starting with barium nitrate solution, describe how a pure sample of barium carbonate can be prepared in the laboratory(Solved)
Starting with barium nitrate solution, describe how a pure sample of barium carbonate can be prepared in the laboratory.
Date posted: February 3, 2017. Answers (1)
- Describe how a pure sample of lead (II) sulphate can be prepared in the laboratory starting with lead metal(Solved)
Describe how a pure sample of lead (II) sulphate can be prepared in the laboratory starting with lead metal
Date posted: February 3, 2017. Answers (1)
- Describe one method that can be used to distinguish between sodium sulphate and sodium hydrogen sulphate(Solved)
Describe one method that can be used to distinguish between sodium sulphate and sodium hydrogen sulphate.
Date posted: February 3, 2017. Answers (1)
- Distinguish between the terms deliquescent and efflorescent as used in chemistry(Solved)
Distinguish between the terms deliquescent and efflorescent as used in chemistry.
Date posted: February 2, 2017. Answers (1)
- Describe how a solid sample of the double salt, ammonium iron (II) sulphate, can be prepared using the following reagents(Solved)
Describe how a solid sample of the double salt, ammonium iron (II) sulphate, can be prepared using the following reagents: Aqueous ammonia, sulphuric (VI) acid and iron metal
Date posted: February 2, 2017. Answers (1)
- Distinguish between a deliquescent and hygroscopic substance (Solved)
Distinguish between a deliquescent and hygroscopic substance.
Date posted: February 2, 2017. Answers (1)
- Starting with sodium metal, describe how a sample of crystals of sodium hydrogen carbonate may be prepared(Solved)
Starting with sodium metal, describe how a sample of crystals of sodium hydrogen carbonate may be prepared.
Date posted: February 2, 2017. Answers (1)
- Starting with copper metal, describe how a sample of crystals of sodium hydrogen carbonate may be prepared in laboratory(Solved)
Starting with copper metal, describe how a sample of crystals of sodium hydrogen carbonate may be prepared in laboratory.
Date posted: February 2, 2017. Answers (1)
- Some sodium chloride was found to be contaminated with copper (II) oxide. Describe how a sample of sodium chloride can be separated from the mixture (Solved)
Some sodium chloride was found to be contaminated with copper (II) oxide. Describe how a sample of sodium chloride can be separated from the mixture
Date posted: February 2, 2017. Answers (1)
- Describe how a solid sample of zinc (II) carbonate can be prepared starting with zinc oxide(Solved)
Describe how a solid sample of zinc (II) carbonate can be prepared starting with zinc oxide.
Date posted: February 2, 2017. Answers (1)
- When potassium nitrate is heated, it produces potassium nitrite and gas C1(Solved)
When potassium nitrate is heated, it produces potassium nitrite and gas C1
a) Identify gas C1
b) Name the type of reaction undergone by the potassium nitrate
Date posted: February 2, 2017. Answers (1)
- How would you obtain a sample of pure iodine from a mixture of iodine and lead sulphate?(Solved)
Explain how you would you obtain a sample of pure iodine from a mixture of iodine and lead sulphate.
Date posted: February 2, 2017. Answers (1)
- Starting with copper metal, describe how a solid sample of copper (II) carbonate can be prepared(Solved)
Starting with copper metal, describe how a solid sample of copper (II) carbonate can be prepared
Date posted: February 2, 2017. Answers (1)
- Describe how a solid sample of lead (II) Chloride can be prepared using the following reagents; dilute nitric (V) acid, dilute hydrochloric acid and lead carbonate(Solved)
Describe how a solid sample of lead (II) Chloride can be prepared using the following reagents; dilute nitric (V) acid, dilute hydrochloric acid and lead carbonate
Date posted: February 2, 2017. Answers (1)
- Explain how you would obtain solid sodium carbonate from a mixture of lead carbonate and sodium carbonate powders(Solved)
Explain how you would obtain solid sodium carbonate from a mixture of lead carbonate and sodium carbonate powders.
Date posted: February 2, 2017. Answers (1)
- Describe how the following reagents can be used to prepare lead sulphate(Solved)
Describe how the following reagents can be used to prepare lead sulphate. Solid potassium sulphate, solid lead carbonate, dilute nitric (V) acid and distilled water.
Date posted: February 2, 2017. Answers (1)
- Why is there is general increase in the first ionization energies of the elements in period 3 of the periodic table from left to right?(Solved)
Explain why there is general increase in the first ionization energies of the elements in period 3 of the periodic table from left to right.
Date posted: February 2, 2017. Answers (1)
- Yellow phosphorous reacts with chlorine gas to form a yellow liquid. The liquid fumes when exposed to air. Explain these observations (Solved)
Yellow phosphorous reacts with chlorine gas to form a yellow liquid. The liquid fumes when exposed to air. Explain these observations.
Date posted: February 2, 2017. Answers (1)