Give a balnced equation for: a)Hydrogen to a colourless acidic gas - using a coloured acidic gas. b)A trivalent metallic oxide - to a metal - using hydrogen.
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Answer:
a.) H2 + Br2 —> 2HBr
b.) Fe2O3 + 3H2 —> 2Fe + 3H2O
Explanation:
a.) Hydrogen reacts with brown coloured bromine gas at around 200-400 degree celcius, with asbestos or some other suitable metal as a catalyst, to form hydrogen brominde, a colourless strong acid.
b.) Iron oxide (trivalent oxide, having valency of iron 3 and oxidation state of iron being +3) reacts with hydrogen gas to form metallic iron, which is iron oxide reduced to metallic iron and water in the presence of hydrogen.
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