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Define oxidation number. Balance the following equation using oxidation number method. As_(2)S_(3)+HNO_(3)+H_2O to H_3AsO_4+H_2SO_4+NO |
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Answer» Solution :Oxidation number : It is DEFINED as the imaginary the compound have been removed in their usual oxidation states that are assigned according to set of RULES. Step 1 : `As_(2)S_(3)+HNO_(3)+H_(2)OrarrH_(3)AsO_(4)+H_(2)SO_(4)+NO` Step 2 : Assign the oxidation numbers and identify the redox couples.  Step 3 : Multiply `As_(2)S_(3)"by "3 and HNO_(3)" by "2.` 3 `As_(2)S_(3)+2HNO_(3)+H_(2)OrarrH_(3)AsO_(4)+H_(2)SO_(4)+NO` Step 4 : Balance all the elements in the EQUATION (As,S and N) except H and O. `3As_(2)S_(3)+2HNO_(3)+H_(2)Orarr6H_(3)AsO_(4)+9H_(2)SO_(4)+2NO` Step 5 : Balance the COMPLETE equation including O & H. `3As_(2)S_(3)+28HNO_(3)+4H_(2)Orarr6H_(3)AsO_(4)+9H_(2)SO_(4)+28NO` |
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