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- Put excess CuO in dilute H2SO4.
- Filter excess CuO
- Add BaCl2/Ba(NO3)2 solution
- Filter to get BaSO4
- Wash the precipitate with distilled water.
- Dry the precipitate between filter paper.
john3 answered the question on November 5, 2017 at 06:17
- Pure nitric (V) acid is colourless but the products in the laboratory preparation is usually yellow. Explain(Solved)
Pure nitric (V) acid is colourless but the products in the laboratory preparation is usually yellow. Explain
Date posted: November 5, 2017. Answers (1)
- Nitric (V) acid may be prepared in the laboratory by the action of concentrated sulphuric (VI) acid on a suitable nitrate and distilling OFF the...(Solved)
Nitric (V) acid may be prepared in the laboratory by the action of concentrated sulphuric (VI) acid on a suitable nitrate and distilling OFF the nitric (V) acid.
(a) Why is the apparatus consisting of glass desirable
Date posted: November 5, 2017. Answers (1)
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State two properties of copper that make it suitable for making ornaments
Date posted: November 5, 2017. Answers (1)
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A saturated solution of a salt Y at 300C weighing 76g yielded 34g of solid when evaporated to dryness. What is the solubility of the salt at 300C
Date posted: November 5, 2017. Answers (1)
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Explain why the second ionization energy is higher than the first ionization energy
Date posted: November 5, 2017. Answers (1)
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Date posted: November 5, 2017. Answers (1)
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Give one industrial use of chlorine gas
Date posted: November 5, 2017. Answers (1)
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Apart from manganese (IV) oxide, give the formula of any two compound that can be used in the preparation of chlorine
Date posted: November 5, 2017. Answers (1)
- A student from Ikerege Secondary School poured accidentally concentrated sulphuric acid on his brown sugar.
(i) State and explain the observation made(Solved)
A student from Ikerege Secondary School poured accidentally concentrated sulphuric acid on his brown sugar.
(i) State and explain the observation made
Date posted: November 5, 2017. Answers (1)
- A mixture contains ammonium chloride, silver chloride and lead (II) chloride. Describe how each of the substance can be obtained from the mixture(Solved)
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Date posted: November 5, 2017. Answers (1)
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Name one reagent that can be used to distinguish between Al3+ and Zn2+ ions in solution and state what would be observed if each of the ions is treated with the reagent you have named.
Date posted: November 4, 2017. Answers (1)
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Date posted: November 4, 2017. Answers (1)
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Date posted: November 4, 2017. Answers (1)
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Date posted: November 4, 2017. Answers (1)
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Date posted: November 4, 2017. Answers (1)
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State and explain the observation made when coloured flowers are placed into a gas jar full of chlorine gas
Date posted: November 4, 2017. Answers (1)
- (a) During the extraction of Aluminium, the oxide of metal is dissolved in Molten cryolite before it is electrolysed. Explain. (b) Giving reasons, state two uses...(Solved)
(a) During the extraction of Aluminium, the oxide of metal is dissolved in Molten cryolite before it is electrolysed. Explain.
(1mk)
(b) Giving reasons, state two uses of Aluminium metal
Date posted: November 4, 2017. Answers (1)
- Explain why Hydrogen Sulphide is a gas at room temperature while water is liquid at room temperature(Solved)
Explain why Hydrogen Sulphide is a gas at room temperature while water is liquid at room temperature
Date posted: November 4, 2017. Answers (1)
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State and explain the observations made when concentrated nitric (V) acid is added to copper turnings
Date posted: November 4, 2017. Answers (1)
- Explain how the rate of the reaction between lead and nitric (V) acid would be affected if the temperature of the reaction mixture was lowered.(Solved)
Explain how the rate of the reaction between lead and nitric (V) acid would be affected if the temperature of the reaction mixture was lowered.
Date posted: November 4, 2017. Answers (1)