Why magnesium and manganese react with very dilute hn o3 to what attitude?
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Since nitric acid is a very good oxidizing agent no metal liberates hydrogen gas with it .However, nitric acid reacts with manganese in dilute form ( oxidizing property reduced due to dilution) to give hydrogen gas .Mn +HNO3 gives you Mn(NO3)2+ H2 .It is also true with magnesium
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