Get premium membership and access questions with answers, video lessons as well as revision papers.
Add ethanol to the flask containing the mixture of iron(III)chloride,zinc(II)oxide and potassium chloride.Iron(III)chloride being highy soluble in ethanol,it disolves leaving the insoluble Potasium chloride and zinc(II)oxide as solid.Filter the mixture to obtain iron(III)chloride as filtrate and a mixture of
Potasium chloride and zinc(II)oxide as residue.Warm the solution of iron(III)chloride to evaporate the ethanol that highly siblimes leaving iron (iii) chlodide as crystals.Transfer the residue in another flask and add water to it.Potassium chloride being highly soluble in water,it dissolves leaving the insoluble Zinc (ii) oxide as a solid.Filter the mixture to obtain Potassium chloride as a filtrate and Zinc ii Oxide as residue.Dry the residue between filter papers.Heat the filtrate to saturation level and allow it to cool to form crystals of potassium chloride.Dry the crystals between the filter papers.
Mr Masinde answered the question on April 24, 2018 at 14:19
- A sample of calcium chloride is contaminated with anhydrous aluminum chloride. Explain how a sample of calcium chloride can be obtained from the mixture(Solved)
A sample of calcium chloride is contaminated with anhydrous aluminum chloride. Explain how a sample of calcium chloride can be obtained from the mixture
Date posted: April 23, 2018. Answers (1)
- Substance Q has a melting point of 15°C and boiling point of 70°c.
(a)On the same axis,draw the melting point and boiling point graph for Q...(Solved)
Substance Q has a melting point of 15°C and boiling point of 70°c.
(a)On the same axis,draw the melting point and boiling point graph for Q and the room temperature.
(b)State the physical state of substance Q at room temperature.
Date posted: April 22, 2018. Answers (1)
- 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)