CHEM 1 P9 2 Assignment 19 . Electrochemistry* Assignment 19 , Version # 453 1 . ( a) Balance the following half -reactions by the jon- election half
CHEM 1 P9 2 Assignment 19 . Electrochemistry*Assignment 19 , Version # 4531 .( a) Balance the following half -reactions by the jon- election half – reaction method :"( 1 ) ( acid solution ) NO 2 ( 8 ) – NO ; ( 29)( ii ) ( acid solution ) HaSeO s ( aq) _ Se ( S )( iii ) ( base solution ) P * ( s ) – PH; ( 8 )|( iv ) ( base solution ) Co ( OH ) 3 ( S ) – COO 2 ( S )( b) Which of the above equations are oxidation half – reactions ?*( C ) Give the formulas of the reactants that become oxidized in the course of the reaction .2 .Balance the following redox equations by the ion- election half – reaction method :"( a ) ( acid solution ) : MnO *- + H.SO 3- – Mnz * + 50 4 2 -1( b ) ( acid solution ) : UO 2 2 + + As ( s) + CF – U+ + + Agcl ( S )( C ) ( basic solution ) : Al ( s ) + OH- – AI ( OH) +- + Hz ( 8 )3 .( a) Aqueous H12.SO 4 is subjected to electrolysis . One of the half – reactions is2 H + ( 29) + 2 @- – – H2 ( 8 )How many faradays of electricity are required to produce 3. 65 [ of Hz at 753 tort and 22 ‘ C ?( b ) If a current of 4 . 50 A is used , how many hours will it take to carry out the electrolysis in part ( a ) ?’4 .( a ) Use the standard reduction potentials at 25 0 C in Table 18 . 1 in Tro , Fridgen and Shaw , andcalculate the standard emf E of an electrochemical cell described by the following reaction :"( b) What is n ?"My + 2 K * – 2 K + Might( C ) What is A G for this reaction at 25 0 ?'( d ) What is the equilibrium constant for this reaction at 250 ?5 .( a ) Use the standard reduction potentials at 25 0 C in Table 18 . 1 in Tro , Fridgen and Shaw , andcalculate the standard emf E of an electrochemical cell described by the following reaction :"Be + Most~ Best + My8.25 x 10 – 2 ?|( b ) What is the value of E if the concentration of Meat is 1. 78 x 10 – * and the concentration of Beat is( C ) If E = – 0. 40 V and Might = 0 . 10 M , what is the concentration of Bez + ?!6 .Given the following equations ."( 1 ) D + B 3 + — D3 + + Bgoes( 11 ) 3 A + + D – 3 A + D }( ill ) C + 2 A * ~|( 2 + + 2 Adoesn’t gogoesArrange the elements A , B , C , and D from the strongest to weakest reducing agent .
