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You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature.

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You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature.

by The Imperator
(28.5k points)
in Chemistry
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+2 votes

2 Answers

by The Imperator
(28.5k points)
0 votes

Aim: To test the nature of oxides formed by metals and non-metals. Materials Required: Sulphur powder, Mg ribbon, water, blue litmus paper, red litmus paper.
Procedure:
1.Take magnesium ribbon with a pair of tongs and
burn it in flame in the presence of air.
2.Collect the product formed and dissolve it in warm water.
3.Add red litmus paper into it.
4.Observe the change in colour and decide the nature of the oxide formed.
5.Burn sulphur in a deflagrating spoon in the presence of air and dissolve the oxide formed in water.
6.Dip blue litmus paper into the solution and observe the changein the colour and decide the nature of the oxide formed.
Observation: The oxide formed by metal turns red litmus blue whereas oxide of non-metal turns blue litmus red.
metals-non-metals-chapter-wise-important-questions-class-10-science-9

Conclusion: Most of the metallic oxides are basic in nature whereas most of the non-metallic oxides are acidic in nature.

by LearnyVerse Wizard
(74.3k points)
0 votes
Clean the surface of the magnesium ribbon. Hold it in a pair of tongs and burn in air. Collect the white ash formed in a china dish. Transfer it in a test tuve and dissolved in water. Dip a red litmus paper strip in the solution. It willl change to blue showing that the metal oxides are of basic nature. The chemical equations involved are ,
2Mg(s)+O2(g)−→heat2MgO(s)Magnesium oxide2Mg(s)+O2(g)→heat2MgO(s)Magnesium oxide
MgO(s)+H2O(aq)→Mg(OH)2(aq)MgO(s)+H2O(aq)→Mg(OH)2(aq)
Similarly, heat the sulphur powder on a spatual. When it starts burning, immediately dip it in a test tube containing water. Now dip a blue litmus paper in the soltion. It will immediately acquire red colour. This shows that oxides of non-metals are acidic in natue.
S(s)+O2(g)−→heatSO2(g)S(s)+O2(g)→heatSO2(g)
SO2(g)+H2O(aq)→H2SO3(aq)

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