Chem%20112%20Practice%20exam%203

Chem%20112%20Practice%20exam%203 - Chem 112 Section 2 Exam...

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Page 1 Chem 112 Section 2 Exam 3 Name:______________________________________ Seat # Please put each of your answers on the front cover to make it easier for grading. I will also check in the test booklet for problems that require calculations. If the answer is wrong, partial credit will be given whenever possible. Most of the questions have more than 1 part, put the answers to all parts in the same row. All questions are worth the same amount. You must have calculations present within the test to get credit for an answer even if the answer is correct . The seat you are sitting in is linked to a particular exam. The seat number you write down must match the exam or you will also lose 40 points automatically!!!!! 1 AuCl Lowest K sp results in more salt and fewer ions. K sp = [Au+][Cl-] 2x10 -11 M 2 Na 2 SO 4 (aq) + Pb(NO 3 ) 2 (aq) a2right PbSO 4 (s) +2 Na + (aq) + 2NO 3 - (aq) PbSO 4 Q= 4 x 10 -6 3 Ksp = [Ca+][OH-] 2 1 x 10 -2 2 x 10 -2 M Solubility will decrease Equilibrium will shift toward reactant which is the solid salt. 4 AgCl(s) Ag + (aq) + Cl- (aq) Ag + (aq) + 2NH 3 (aq) [Ag(NH3) 2 ] + (aq) K eq = 4x 10 -3 5 Cathode: Ni Reducing Agent: Fe Fe(s) Fe 3+ (aq)  Ni 2+ (aq) Ni(s) -0.22V 6 6 Nonspontaneous cell Soluble ion formed when a metal ion is surrounded by, but not bonded to ligands S= 87 J/molK 7 -78kJ Spontaneous, Exothermic Boiling point 0 8 - 156 kJ E ˚ =(-156000 / (-2 x 96485) K p = e^ (-156000 /( -8.324 x 298))
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Page 2 Kinetics and Equilibrium:
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