Question

A magnesium ribbon burns with a white dazzling flame, leaving behind white powdery ash. (i) State the chemical composition of ash and write the reaction. (ii) How will you test whether it is acidic or basic? (iii) Write the reaction which occurs on dissolving this ash in water.

Answer 1

Answer:

(i)The ash is composed of MgO.

(ii)MgO + H2O = Mg(OH)2

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Answer 2

Explanation:

The reaction in which one reactant gets oxidised and the other reactant gets reduced is called redox reaction. ii. When a magnesium ribbon burns in air with a dazzling flame and forms a white ash, magnesium gets oxidised to magnesium oxide.

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