Shown below is an oxidation half-reaction in acidic solution. Which of the following correctly balances the reaction? Zn --> Zn(OH) 2 a. Zn+2e ? +2H 2 O?Zn(OH) 2 +2H + b. Zn+2H 2 O?Zn(OH) 2 +2H + c. Zn+2H 2 O?Zn(OH) 2 +2H + +2e ? d. Zn+2H 2 O?Zn(OH) 2 +2H + +e ? Solution Option C is correct Balance as follows Zn------> Zn(OH)2+ 2 e- To balance oxygen atom add water at deficient side Zn + 2 H2O - - - - - - - > Zn(OH)2+ 2 e- To balance hydrogen add H+ Zn+ 2 H2O - - - - - - > Zn(OH)2 + 2 H+ +2e- .