Practice problem- Exam IV - Practice problem 1 Balance the...

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Practice problem 1. Balance the following equation: Cu( s ) + H + ( aq ) + 3 NO ( aq ) NO( g ) + H 2 O( l ) + Cu 2+ ( aq ) The coefficients are: A) 1,2,1,1,1,1 D) 1,2,8,2,4,1 B) 3,2,1,1,1,3 E) 3,2,8,2,4,3 C) 3,2,4,2,4,3 2.Complete and balance the following redox equation using the smallest whole–number coefficients. What is the coefficient of Sn in the balanced equation? 3.Which one of the following is not a redox reaction? A) 4 Al(OH) ( aq ) + 4H + ( aq ) Al 3+ ( aq ) + 4H 2 O( l ) B) C 6 H 12 O 6 ( s ) + 6O 2 ( g ) 6CO 2 ( g ) + 6H 2 O( l ) C) Na 6 FeCl 8 ( s ) + 2Na( l ) 8NaCl( s ) + Fe( s ) D) 2H 2 O 2 ( aq ) 2H 2 O( l ) + O 2 ( g ) E) CO 2 ( g ) + H 2 ( g ) CO( g ) + H 2 O( g ) 4.What is the oxidizing agent in the (unbalanced) reaction?
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5. Consider the reaction CuO( s ) + H 2 ( g ) Cu( s ) + H 2 O( l ). In this reaction, which substances are the oxidizing agent and reducing agent, respectively? A) CuO and H 2 D) H 2 O and H 2 B) H 2 and CuO E) None of these choices is correct.
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