CHEMISTRY 1412 DR. E. OLIVAS 9 Use the following information to answer question

Question

CHEMISTRY 1412 DR. E. OLIVAS 9 Use the following information to answer question GIVEN: +0.80 V Fe" + 1 e' Fe2. E+0.77V E+0.34 V 7) Which is the strongest reducing agent? a) Cu b) Ag c)Ag d) Fee) Cu 8)Find e for the cell Cu" + Ag. Cu" + Ago. a) +1.48V b)-0.46V 1.26V d)+0.46 V e)-1.26 v 9)Find ce' for the cell Ag. + Fe"--Fe" + Ae. a) -0.03V b)+0.03V +1.57V )-1.57V e) None 10) Consider the following unbalanced redox reaction: The coefficients in the balanced equation are, from left to right a) 2, 3, 12, 2,3,6 e) 2, 1, 12, 2, 1,6 11) If 306 Coulombs of charge is passed through a solution of Cu(NO, (aq) calculate the number of grams of copper deposited. a) 0.190 g b)0.108 )0.050gd)45.35 e) 63.2 g 12) For the following reaction 3Ag" + Cr (s)-G" (aq) + 3Ag·dP " +1.54 V. Find&E; if [Cr"'J = 0.010 M and [Ag- = 1.0 × 104 M. a)2.09 V b) 1.34 V 01.74 V d)1.50V e) TV 13) A reaction is spontaneous when d) AG> 0 and AE

Explanation / Answer

Q7

strongest reducing agent --> will oxidize very readily

then, this must be Cu(s)

choose A

Q8

E°cell = EAg - Ecu

E°cell = 0.80 - 0.34 = 0.46 V

choose D

Q9

E° = EAg - EFe

E° = 0.80 - 0.77 = 0.03 V

choose B

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