What redox reaction occurs between MnO2 and HCl?
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MnO2 + Hcl = Cl2 + MnCl2 + H2O
Here, HCl is reduced to Cl2 and H2 gas is oxidized
Here, HCl is reduced to Cl2 and H2 gas is oxidized
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MnO2 + 4HCl -----------> MnCl2 + Cl2 + H2O
The oxidation state of Cl in HCL is -1 and it changes to 0 in the product Cl2. Increase in oxidation number occurs, so Cl- is oxidized.
In MnO2, Mn is +4 state and this becomes +2 in product MnCl2. So decrease of oxidation number occurs, hence Mn is reduced.
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