Get premium membership and access questions with answers, video lessons as well as revision papers.
a.)- Ammonia
- Carbon (IV) oxide
b.) By heating, sodium carbonate when heated does not produce a colourless liquid but sodium hydrogen carbonate produces a colourless liquid.
eddynightsy answered the question on May 2, 2018 at 10:00
- Solvay process is used to manufacture sodium carbonate. (a.) Name two raw materials. (b.) How is sodium carbonate obtained from sodium hydrogen carbonate. (c.) Name two main substances...(Solved)
Solvay process is used to manufacture sodium carbonate.
a.) Name two raw materials.
b.) How is sodium carbonate obtained from sodium hydrogen carbonate.
c.) Name two main substances that are recycled.
Date posted: May 2, 2018. Answers (1)
- Copper II sulphate was made to undergo electrolysis using graphite electrodes. (a.) What is electrolysis. (b.) State the observation made at the cathode.c.) Write the equation for...(Solved)
Copper II sulphate was made to undergo electrolysis using graphite electrodes.
a.) What is electrolysis.
b.) State the observation made at the cathode.
c.) Write the equation for the reaction that took place at the anode.
Date posted: May 2, 2018. Answers (1)
- Describe a chemical test that can be used to distinguish between sodium carbonate and sodium hydrogen carbonate.(Solved)
Describe a chemical test that can be used to distinguish between sodium carbonate and sodium hydrogen carbonate.
Date posted: May 2, 2018. Answers (1)
- Define the following terms: (i.) Hygroscopy (ii.) Efflorescence(Solved)
Define the following terms:
i.) Hygroscopy
ii.)Efflorescence
Date posted: May 2, 2018. Answers (1)
- (a) Name the process used to separate two solids both soluble in the same solvent when the solids are both present in the mixture (b.) Sodium...(Solved)
a.) Name the process used to separate two solids both soluble in the same solvent when the solids are both present in the mixture.
b.) Sodium chloride is neither deliquescent nor hygroscopic. Explain why common salt left on a table overnight becomes wet.
Date posted: May 2, 2018. Answers (1)
- Starting from calcium carbonate, describe how a solid sample of calcium sulphate can be prepared.(Solved)
Starting from calcium carbonate, describe how a solid sample of calcium sulphate can be prepared.
Date posted: May 2, 2018. Answers (1)
- A form four student accidentally mixed sodium carbonate and calcium carbonate. Describe how he would obtain a dry sample of sodium carbonate from the mixture.(Solved)
A form four student accidentally mixed sodium carbonate and calcium carbonate. Describe how he would obtain a dry sample of sodium carbonate from the mixture.
Date posted: May 2, 2018. Answers (1)
- Explain how one would obtain pure sample of potassium carbonate crystals from a mixture of potassium carbonate and calcium carbonate.(Solved)
Explain how one would obtain pure sample of potassium carbonate crystals from a mixture of potassium carbonate and calcium carbonate.
Date posted: May 1, 2018. Answers (1)
- In an attempt to prepare sulphur (IV) oxide gas, dilute sulphuric (VI) acid was reacted with calcium sulphate. The yield of sulphur (IV) oxide was...(Solved)
In an attempt to prepare sulphur (IV) oxide gas, dilute sulphuric (VI) acid was reacted with calcium sulphate. The yield of sulphur (IV) oxide was found to be negligible. Explain.
Date posted: May 1, 2018. Answers (1)
- Describe how a sample of magnesium carbonate can be prepared using the following agents.
-Sodium carbonate
-Magnesium oxide
-Dilute hydrochloric acid(Solved)
Describe how a sample of magnesium carbonate can be prepared using the following agents.
-Sodium carbonate
-Magnesium oxide
-Dilute hydrochloric acid
Date posted: May 1, 2018. Answers (1)
- Describe how a solid sample of lead (II) sulphate would be prepared using the following reagents.
. dilute nitric (V) acid
. solid lead (II) carbonate
. dilute...(Solved)
Describe how a solid sample of lead (II) sulphate would be prepared using the following reagents.
. dilute nitric (V) acid
. solid lead (II) carbonate
. dilute sulphuric (VI) acid
Date posted: May 1, 2018. Answers (1)
- A sample of copper turning was found to be contaminated with copper ii oxide.describe how copper metal can be separated from the mixture
(Solved)
A sample of copper turning was found to be contaminated with copper ii oxide.describe how copper metal can be separated from the mixture
Date posted: May 1, 2018. Answers (1)
- A solution of tetrachloromethane burns colourless when propene gas is bubbled through it . What type of reaction takes place?(Solved)
A solution of tetrachloromethane burns colourless when propene gas is bubbled through it. What type of reaction takes place?
Date posted: May 1, 2018. Answers (1)
- What is meant by the following as used in chemistry. (i) Solubility (ii) Saturated solution(Solved)
What is meant by the following as used in chemistry.
i.) Solubility
ii.) Saturated solution
Date posted: April 30, 2018. Answers (1)
- Suggest a reason why BaSO4(a pigment made from sulphuric acid) would be
suitable in making paint for cars.(Solved)
Suggest a reason why BaSO4(a pigment made from sulphuric acid) would be
suitable in making paint for cars.
Date posted: April 29, 2018. Answers (1)
- What are the properties of alpharadiation?(Solved)
What are the properties of alpha radiation?
Date posted: April 26, 2018. Answers (1)
- What is an Isotope?(Solved)
What is an Isotope?
Date posted: April 24, 2018. Answers (1)
- Why are anesthetics useful in medicine?(Solved)
Why are anesthetics useful in medicine?
Date posted: April 24, 2018. Answers (1)
- Nitric v acid is manufactured by catalytic oxidation of ammonia gas (a) Name two raw materials other than ammonia that are used to manufacture the acid.....(Solved)
Nitric v acid is manufactured by catalytic oxidation of ammonia gas
a. Name two raw materials other than ammonia that are used to manufacture the acid
b. Name the catalyst used.
c. Write an equation for reaction between nitric v acid and ammonia gas
d. sate one use of product in c
Date posted: April 24, 2018. Answers (1)
- A mixture contains iron(III)chloride, zinc(II)oxide and potassium chloride. Describe how each of the substance can be obtained from the mixture(Solved)
A mixture contains iron(III)chloride,zinc(II)oxide and potassium chloride. Describe how each of the substance can be obtained from the mixture.
Date posted: April 23, 2018. Answers (1)