A magnesium ribbon is burnt in oxygen to give a white compoundX accompanied by emission of light. If the burning ribbon is nowplaced in an atmosphere of nitrogen, it continues to burn andforms a compound Y.(a) Write the chemical formulae of X and Y.(b) Write a balanced chemical equation, when X is dissolved inwater
Question
A magnesium ribbon is burnt in oxygen to give a white compoundX accompanied by emission of light. If the burning ribbon is nowplaced in an atmosphere of nitrogen, it continues to burn andforms a compound Y.(a) Write the chemical formulae of X and Y.(b) Write a balanced chemical equation, when X is dissolved inwater
Solution
(a) When magnesium burns in oxygen, it forms Magnesium Oxide (MgO), which is compound X. When the burning magnesium ribbon is placed in an atmosphere of nitrogen, it forms Magnesium Nitride (Mg3N2), which is compound Y.
(b) When Magnesium Oxide (X) is dissolved in water, it forms Magnesium Hydroxide. The balanced chemical equation for this reaction is:
MgO + H2O -> Mg(OH)2
Similar Questions
(a) A piece of magnesium ribbon is ignited and placed in a gas jar of oxygen.The equation for the reaction is 2Mg + O2 → 2MgO (i) Give two observations that would be made in this reaction. (2) 1 ................................................................................................................................................................................................................................................................................ .................................................................................................................................................................................................................................................................................... 2 ................................................................................................................................................................................................................................................................................ ....................................................................................................................................................................................................................................................................................(ii) State why this is an oxidation reaction. (1) .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(b) A second piece of magnesium ribbon is ignited and placed in a gas jar of carbon dioxide.A very exothermic reaction occurs, forming magnesium oxide and carbon.(i) State what is meant by the term exothermic. (1) .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(ii) Give the chemical equation for this reaction. (1) ....................................................................................................................................................................................................................................................................................(iii) A fire starts in a warehouse where magnesium is stored.Suggest why it would not be suitable to use a carbon dioxide fire extinguisher to put out this fire.
Assertion: Magnesium ribbon burns with a dazzling flame in air.Reason: A white substance magnesium nitride is formed.
Magnesium ribbon is burnt in an atmosphere of nitrogen gasto form solid magnesium nitride.
When a magnesium ribbon is burnt in air, what are the two observations that you make?
magnesium ribbon burns with a dazzling flame in air (oxygen)and changes into a white substance, magnesium oxide. Is magnesium being oxidised orreduced in this reaction?
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