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a) The glucose powder changes from white to black.Concentrated H2SO4 is a strong dehydrating agent it removes water elements from compounds.
b) - Manufacture of fertilizers
- Processing metal ores
- Manufacture of detergents
- Manufacture of plastics
- Manufacture of dyes and paints
- Used in lead acid accumulators.
sharon kalunda answered the question on March 19, 2019 at 07:11
- In an experiment air was passed through several reagents as shown in the flow chart below.(Solved)
In an experiment air was passed through several reagents as shown in the flow chart below.
(a) Write an equation for the reaction which takes place in the chamber with magnesium powder.
(b) State the Role of concentrated potassium hydroxide solution.
(c) What observation is made in the chamber containing copper turnings.
Date posted: March 19, 2019. Answers (1)
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The diagram below shows apparatus commonly used in a chemistry laboratory.
(i) What is the name of the above apparatus.
(ii) Label the region of unburnt gases.
(iii) What would happen if part B was closed?
Date posted: March 19, 2019. Answers (1)
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What are the differences among the following? (a) Non polar covalent bond (b) A polar covalent bond (c) An ionic bond.
Date posted: March 12, 2019. Answers (1)
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Predict which of the following bonds will be more polar and give an explanation. P-Cl or S-Cl
Date posted: March 12, 2019. Answers (1)
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Water is a polar molecule. Explain what is meant by the term polar using water as an example.
Date posted: March 12, 2019. Answers (1)
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Describe the preparation of metallic sulphides.
Date posted: March 5, 2019. Answers (1)
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List the uses of Alkenes.
Date posted: March 5, 2019. Answers (1)
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Write the molecular and the structural formulas of Methane.
Date posted: March 5, 2019. Answers (1)
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List three properties of hydrogen chloride gas.
Date posted: March 5, 2019. Answers (1)
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List the uses of chlorine gas and its compounds.
Date posted: March 5, 2019. Answers (1)
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Explain the effects of chlorine gas on a burning candle.
Date posted: March 5, 2019. Answers (1)
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List the environmental effects of acid rain.
Date posted: March 5, 2019. Answers (1)
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Using a table show the comparison between rhombic and monoclinic sulphur.
Date posted: March 5, 2019. Answers (1)
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State and explain three pollution effects of Nitrogen compounds.
Date posted: March 5, 2019. Answers (1)
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Give four conditions necessary when citing a Haber process plant.
Date posted: March 5, 2019. Answers (1)
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Draw a flowchart to show the Haber process.
Date posted: March 5, 2019. Answers (1)
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Describe the action of aqueous ammonia on solution of metallic salts.
Date posted: March 5, 2019. Answers (1)
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Describe the preparation of ammonium solution.
Date posted: March 5, 2019. Answers (1)
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Explain the action of heat on nitrates.
Date posted: March 5, 2019. Answers (1)