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18 April, 20:24

When a magnesium ribbon is heated in air the product former is heavier. on the other hand when potassium manganate (VII) is heated in air the product formed is lighter. Explian the difference iin observation

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  1. 18 April, 21:24
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    Answer: On heating, Magnesium forms its oxide; while potassium manganate (VII) decomposes

    Explanation:

    Magnesium Mg, on heating forms Magnesium oxide

    2Mg (s) + O2 (g) - -> 2MgO

    Potassium permanganate KMnO4, on heating decomposes to potassium manganate K2MnO4, manganese dioxide MnO2, and Oxygen gas O2.

    2KMnO4 - -> K2MnO4 + MnO2 + O2

    The difference in observation is that, on heating, Magnesium forms its OXIDE as product; while potassium manganate (VII) decomposes, giving OFF most of its constituents and reducing its weight.
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