1412 Exam 3 - CHEM 1412 EXAM # 3 (19, 23, and 24) Name: _...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 1412 EXAM # 3  (19, 23, and 24)                  Name: _________________________                                                Score:   Part I-Please DO NOT circle. Write the correct answer in space provided. _____1. Which energy conversion below takes place in a galvanic cell?               A) electrical to chemical          B) chemical to electrical               C) mechanical to chemical      D) electrical to mechanical _____2. Consider a galvanic cell based on the reaction below, what is the coefficient of Fe 3+  in the                balanced  equation in acidic solution?   Fe 2+  + Cr 2 O 7 2-    Fe 3+  + Cr 3+               A) 1          B) 2          C) 3               D) none of these _____3. How many electrons are transferred in the following reaction? 2ClO 3  + 12H +  + 10I      5I 2  + Cl 2  + 6H 2 O                     A) 10                           B) 12                           C) 5                           D) 30 _____4. Which of the following is true for the cell shown here?   Zn (s)    Zn 2+ (aq)     Cr 3+ (aq)    Cr (s) A) the electrons flow from cathode to the anode                B)  the electrons flow from the zinc to the  chromium              C)  the electrons flow from the chromium to the zinc              D)  the zinc is reduced  _____5. Which of the following reactions is possible at the anode of a galvanic cell?                A) Zn   Zn 2+  +2e                          B) Zn 2+  + 2e    Zn                C) Zn 2+  + Cu   Zn + Cu 2+             D) Zn + Cu 2+    Zn 2+  + Cu _____6. The standard reduction potentials for the following half reactions are given as follows; 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
               Cr 3+  + 3e    Cr (s)             E 0  = -0.73 V                Br 2(aq)  + 2e    2Br -  E 0  = +1.09 V                         what is the E 0  for this cell?                  A) 1.82 V                          B) 0.36 V                        C) 4.75 V                             D) 1.79 V                  _____7. A voltaic cell has an E 0  value of +1.00 V. The reaction :               A) is not spontaneous      B) has K =1                    C) has a negative 
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/01/2008 for the course NUTRI 4112 taught by Professor Fleatcher during the Spring '08 term at University of Houston.

Page1 / 9

1412 Exam 3 - CHEM 1412 EXAM # 3 (19, 23, and 24) Name: _...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online