- Octane and ethanol are liquids at a room temperature. Ethanol is soluble in water while octane is insoluble. Explain how water can be used to...(Solved)
Octane and ethanol are liquids at a room temperature. Ethanol is soluble in water while octane is insoluble. Explain how water can be used to separate the mixture of octane and ethanol.
Date posted: April 22, 2018. Answers (1)
- Explain why ammonium trioxocarbonate (iv) leaves no residue when heated(Solved)
Explain why ammonium trioxocarbonate (iv) leaves no residue when heated
Date posted: April 22, 2018. Answers (1)
- Write chemical equation for reaction between dry hydrogen gas and heated lead (ii) oxide(Solved)
Write chemical equation for reaction between dry hydrogen gas and heated lead (ii) oxide.
Date posted: April 21, 2018. Answers (1)
- (i) What is rusting?
(ii) Give the chemical name of rust.(Solved)
(i) What is rusting?
(ii) Give the chemical name of rust.
Date posted: April 21, 2018. Answers (1)
- Explain the term fractional crystallization(Solved)
Explain the term fractional crystallization.
Date posted: April 21, 2018. Answers (1)
- Describe the process of extraction of Aluminium by electrolysis(Solved)
Describe the process of extraction of Aluminium by electrolysis.
Date posted: April 20, 2018. Answers (1)
- State uses of radio isotopes in the following: 1. Medicine 2. Agriculture 3. Industries(Solved)
State uses of radio isotopes in the following:
1. Medicine
2. Agriculture
3. Industries
Date posted: April 19, 2018. Answers (1)
- Given the following reagents describe how to prepare lead (ii) sulphate, Solid potassium sulphate, solid lead (ii) carbonate, dilute nitric (iv) acid and distilled water.(Solved)
Given the following reagents describe how to prepare lead (ii) sulphate: Solid potassium sulphate, solid lead (ii) carbonate, dilute nitric (iv) acid and distilled water.
Date posted: April 19, 2018. Answers (1)
- What are the advantages of universal indicators over other acid-base indicators?(Solved)
What are the advantages of universal indicators over other acid-base indicators?
Date posted: April 19, 2018. Answers (1)
- The heat of fusion and vaporization of water are 334.4Kj and 1159.4 Kj respectively. Explain why there is a big difference between the two
(Solved)
The heat of fusion and vaporization of water are 334.4Kj and 1159.4 Kj respectively. Explain why there is a big difference between the two
Date posted: April 18, 2018. Answers (1)
- A crystal of copper (II) sulphate was placed in a beaker of water. The beaker was left standing for two days without shaking. State and...(Solved)
A crystal of copper (II) sulphate was placed in a beaker of water. The beaker was left standing for two days without shaking. State and explain the observations that were made.
Date posted: April 17, 2018. Answers (1)
- Explain how the hotness of a bunsen burner flame can be increased(Solved)
Explain how the hotness of a bunsen burner flame can be increased.
Date posted: April 17, 2018. Answers (1)
- Explain why it is not advisable to store a solution of cadmium nitrate in a container made of zinc(Solved)
Explain why it is not advisable to store a solution of cadmium nitrate in a container made of zinc.
Date posted: April 17, 2018. Answers (1)
- Name two non-crystalline form of Sulphur(Solved)
Name two non-crystalline form of Sulphur.
Date posted: April 17, 2018. Answers (1)
- Dry ammonia gas is passed over heated lead(II) oxide in a combustion tube.
a) What observation would be made in the combustion tube
b) Outline a chemical...(Solved)
Dry ammonia gas is passed over heated lead(II) oxide in a combustion tube.
a) What observation would be made in the combustion tube
b) Outline a chemical test you would use to identify the colourless liquid collected in the u-tube
c) Name the colourless liquid
d) Write an equation for the reaction between ammonia and lead(II)oxide
Date posted: April 17, 2018. Answers (1)
- Name the method that can be used to obtain pure iron (III) chloride from a mixture of iron (III) chloride and sodium chloride(Solved)
Name the method that can be used to obtain pure iron (III) chloride from a mixture of iron (III) chloride and sodium chloride.
Date posted: April 14, 2018. Answers (1)
- What is a Neutrino? (Solved)
What is a Neutrino?
Date posted: April 14, 2018. Answers (1)
- State four applications of Nuclear Radiation(Solved)
State four applications of Nuclear Radiation.
Date posted: April 14, 2018. Answers (1)
- State and explain the five main components of Nuclear Power Plants that enables them use heat from nuclear reactors to produce electrical energy. (Solved)
State and explain the five main components of Nuclear Power Plants that enables them use heat from nuclear reactors to produce electrical energy.
Date posted: April 14, 2018. Answers (1)
- Give a reason why electrons are removed from the 4s orbital first then the d orbital to form cations(Solved)
Give a reason why electrons are removed from the 4s orbital first then the d orbital to form cations.
Date posted: April 14, 2018. Answers (1)