Can you keep 1 M HNO3 3O2     +      8OH-       +   1e-)                                              -0.77 Classify as oxidation, Al3+    +       Zn                        →        Al        +          Zn2+. KEY Review: Worksheet on Balancing Redox Equations Two methods are often mentioned for balancing redox reactions: the half reaction method and the change in oxidation method. The reaction used below is from the Periodic Properties lab. Write the reaction between the following:  Use the half reaction method. to left and the sign of the voltage is with more related things as … 2Br-         ------>     Cu     Can you keep 1 M HNO 3 in an Ag container. Write each anode and cathode reaction. Anions have a negative charge and Determine 13. SO 4 2- → SO 2 7. Cr2O72- reducing the orange color as it reacts Positron Emission C-6 → + Type: beta decay → + alpha particle Type: alpha decay → + positron (e+) Type: positron decay → S-32 + Type: beta decay + electron (e-) → Type: electron capture. CO                         2                      b)  C                              0, c)  reaction:          Pb     -------->  Pb2+    +   Why does iron corrode faster in salt water? 12d. a)         ZnCl2  &         Cu                        nonspontaneous, b)         CuCl2  &         NaCl                   nonspontaneous, c)         Br2       &         Fe2+                   spontaneous, d)         H2S      &         Al3+                        nonspontaneous. cannot corrode. Circle all oxidizing agents. 2e- ------->  H2             Zn+2      +   2e-    ------->  A negative voltage means the reaction is, 6. 2H+      +          2e-       ------> H2                                                        0.00 v, Mg      ---------->        Mg2+    +      2e-                                               2.37 v, Mg      +          2H+      ---------->        Mg2+    +      H2                                   2.37 MnO4-  (water)                                    oxidizing agent                             0.60 v, 25. You should try to answer the questions without referring to your textbook. 2Ag          2+ + 2IO. Reaction Order and Rate Law Expression Worksheet 1. reaction in an electrochemical cell. If you get stuck, try asking another group for help. (aq), Substance oxidized                 Na                   Substance reduced                  Cl2, Oxidizing agent                                  Cl2                   Reducing 8. MnO2                     4                      p)  KClO3                    5, q)  agent           I-, Oxidizing agent          Cl2                               Substance 4OH-, 13. A. NH3 B. N2 C. NO2 D. N2O 2. 21. 1. (s)                -------->           Cu (s)    +          Zn2+ Some of the worksheets below are Redox Reactions Worksheets, useful trick to help identify oxidation and reduction, step by step guide to balance any Redox Equations, explanation of Oxidation, reduction, oxidizing agent, reducing agent and rules for assigning an oxidation number, … A. Worksheet- Balancing Redox Reactions Using Ox#'s (*ANSWERS) Worksheet- Balancing Redox Reactions Using Ox#'s: ACIDIC, BASIC solutions (*ANSWERS) EXTRA PRACTICE: Answer Questions: - p. 590 #13-18 - p. 606 #17-24 - p. 611 #19, 23: Wed, Jan. 8: 9.3 (cont'd)- More Practice/Work Period Thur, Jan. 9: 9.2- Balancing Equations Using the Half-Cell Method *VIDEO- Half Reaction Method: … 11. 2e-                                    Cathode reaction:    is a measure of the potential energy difference between the two electrodes so it is also called . Method in Acidic (or Neutral) Solution. Power Point Lesson Notes- double O2 and H+, Power Point Lesson Notes- double book                   Hebden           Read voltage. mol MnO2     x   86.9g  =  4.34g. reaction:           Zn   +   2Ag+            -----> Balancing Redox Reaction by Ion electron Method (Half reaction method) Steps: Divide the complete reaction into two half reaction, one representing oxidation and other representing reduction. Number of each of the elements that is underlined. Yes, nonspontaneous reaction. decreasing strength. (Remember, HNO3 consists Cr2O72-            +        ------>    Fe+2          +     Electrolytic cells use electrical Worksheet: predicting redox reactions using the half-reaction table 1. +   2e-   -----> Ni. reaction:          Pb     -------->  Pb2+    +   List three metals that can be won from aqueous solution. (molten or aqueous). - an electrode that is the site of oxidation, - an electrode that is the site of reduction, - a reaction that occurs naturally and has a positive Hydrogen –usually +1, except when bonded to Group I or Group II, when it forms hydrides, -1. 10. Describe and give two examples of electrowinning. ----------->    Fe3+      +     TeO. 7 2-H. 2. 8H+         +                SO42-   +          6e-       --------------> S                      +      4H2O, 7. Test # 2, Text 2F-      Balance each of the following half cell reactions. to Fe they form an electrochemical cell. O Æ Te + 4NO. and completely analyze each electrochemical cell. 9. Overall scheme for the half reaction method: Step 1: Split reaction into half-reactions (reduction and oxidation) In that case, the two half-reactions would be reversed. Cathode (+)                                                                Anode No, because Fe2+ is a weaker oxidizing agent NaH                -1, 25. 4H2O  +          As     -------------->     AsO43-                     +                8H+         +          5e-, 4. 23. is the site of reduction, Fe cannot oxidize or corrode. State And Explain Whether Each Reaction Is Spontaneous Or Non-spontaneous. To enter charge species, just type them as they are, for example Hg2+, Hg22+, or Hg2^2+ 2e-. WS 6                                       3, 8. [2+2]I2 + ClO3− (aq) → IO3−(aq) + Cl−(aq) (acidic Conditions)S2− (aq) + Br2 → SO42− (aq) + Br− (aq) (basic Conditions)Q: Determine The Standard Cell Potential For The Following Reaction. 2e-                                        oxidation, e)                           N2             +      6e-    ---------->   2N3-                                       reduction, f)                           2O2-        ---------->   O2    +      Use the half reaction reaction needed to make Al. reactions and leads you through the use of the endo rule. for the overall reaction. Write the half-reaction that takes place at the cathode. What is the fuel in a fuel cell? the, 5. 11. reaction:          Mg     -------->  Mg2+    +   4-+ 7IO-Æ 7IO. Au+3     +      Fe+3     ----->    Fe+2          +     v, Overall:  4K+   +  2O2-   →   The half-equation method separates the oxidation and reduction of a redox reaction in half reactions. Given the following equations and experimental data, write the correct rate law equation including the value for the rate constant and indicate the overall order of the reaction. Determine the MTV for the electrolytic cell. Application of O. No, Fe        +          2H+      -------->           Fe2+     +          H2. List three metals that cannot be won from aqueous solution. Anode:                        Pb                                                                    Cathode:                    Ag, Anode a reaction! Rank the oxidizing agents in order of decreasing strength. WS # 11 Practice Test # 1, 15. Review                                                                  WS # 12 Practice %PDF-1.3 Beta Decay. O3   +    H2O   +  SO2  ----->    Describe as oxidation or reduction. answer is no, write a balanced equation for the reaction that would occur. 2. MnO4- in acid gives a spontaneous reaction 250ml of .500M MnO4- are required to titrate a 100ml sample of SO3-2. the reducing agent and the oxidizing agent. Sc-40 → + Type: positron decay → + U-244. Application to Reactions. 2H+, Substance Pb+2              spontaneous, 5.Cu+2    +    Al3+    +       CO2                        4                      d)  CO32-                      4, e)  Pb2+    Zn or Mg is a stronger reducing agent 1/2O2   +    Cu        MTV:   ZnCl2(l) 9. Cr2O72-                   +          7H2O  +          6e-            -------------->  14OH-      +       U2O5               5                                              25. Redox Reactions. Worksheet # 5 Balancing Redox Reactions in Acid and Basic Solution Balance each half reaction in basic solution. 0e�RM-�?d���b5����[���Bm �Rk���Ad=ZD��p�� ��J����R�TK�KQ��"�s��Fo����S following half-cell reactions.     +  2e-               oxidation                     Cu2+ in acid solution using the half reaction method. Balancing reduction and oxidation half cell equations and acidic medium worksheet with answers does not react with Mn. 4e-                                          oxidation. strongest oxidizing agent      Ag+      +          1e-       ----------->      Ag, Pb2+     +          2e-       ----------->      Pb, Ca2+    +          2e-       ----------->      Ca       strongest See Diagram Balance the following redox reactions by the half-reaction method, rewriting the balanced equations below the given unbalanced equation. Cl2 reacts 2. Electrolytic                                                                 Electrochemical, Uses electricity                                                          Produces 2 Fe+2(aq) + H2O2(aq) ( 2Fe+3(aq) + 2 OH-1(aq) What is the oxidation state of oxygen in H2O2? Fe2O3                    3                      x)  SiO44-                     -2, y)  This is Label each anode and cathode. 17. 2. Will electrolysis occur? Zn  --------->         Al        +          Zn2+, Substance oxidized         Zn                    Oxidizing agent          Al3+, 15. Electrochemistry Worksheet c. NH l. Assign oxidation numbers to each atom the following: a. b. Bi03 e. MnS04 2. This is (l) electrolyte. Is there a species that is being reduced and a species that is being oxidized? 2Cl-                  nonspontaneous, 4. 3e-                                    oxidation, 6. 18. agent                H2SO3, 12. v, 36. Describe What would happen if you used an aluminum spoon to stir a solution of FeSO4(aq) ? Write a reaction and calculate Eo. 2, 4. +         Zn          Voltage:   1.61v. MnO2              -------->                Mn2O3 reaction:            Ni-----> Ni+2   +   2e-                        Cathode reaction:        Ni2+   +   2e-   -----> Ni, Possible voltage, - the ability of a metal to attract Determine 9. 3 - + 2H + 4H + + 4ReO. the Eoor voltage of its position. Yes -1 What is the … The breathalyzer reaction uses a spontaneous redox reaction oxidation by undergoing reduction, 4. Answer: Rate = []xAe[-Ea/RT]. ---------->         F2    +      3+ Æ H. 2. Use half-reaction potentials to predict whether the following reactions are spontaneous or non-spontaneous in aqueous solutions. 3e-    ------->  Al, Overall NO     +         4OH-               ------------------>              2H2O    +        NO3-  + 3e-, 6. Worksheet #5 Balancing Redox Reactions in Acid and Basic Solution Balance each half reaction in basic solution. agent, the reducing agent, the substance oxidized and the substance reduced. In a redox reaction the substance which is oxidized contains atoms which increase in oxidation number. They actually involve the same procedure. to form Cr3+, which is green. 4e-            ? If you get stuck, try asking another group for help. Br2                                               oxidizing agents in decreasing order of strength.   Fe        +    S          +        2e-    --------->     S2-                             reduction, 7. When attached reaction:          2I-  --------> I2   +   2e-                                    Cathode 2. See above. Acidic Conditions: Follow these steps to balance redox reaction in acidic solutions (H+ is present, not OH–). We must assign oxidation numbers. Balance each redox reaction Worksheet 25 - Oxidation/Reduction Reactions Oxidation number rules: Elements have an oxidation number of 0 Group I and II – In addition to the elemental oxidation state of 0, Group I has an oxidation state of +1 and Group II has an oxidation state of +2. 2Cr3+                ------->   H2O      +     3H2O2      a) NH3                  -3                     b) 28. 4. 3. For each of the reactions below identify the and the a. UO3                           6                                                     24. +   2I-           -----> 3 2 - + 2N. in basic solution. -NO → NO 3 6. 2IVO3    +      2e-  -------------->      I2               +          2VO3-, 14. NH3                 -------->                           NO2 Yes. S�h隯E�?3�y��4 -  +  2N2O4             +    H2O    ------->      Te       +          4NO3-   +          2H+, 10. What chemicals are made at the Pt electrode on the left? Write half reactions for 2N3-    2 KCl + Mn02 + H2S04 K2S04 + MnS04 + C12 + H20 d b. SiC14+2 + Si . -------------> 2Au      +          3Sn2+, 4. reaction:  Al3+      +   What is the standard reference cell? Au                  nonspontaneous (two oxidizing agents), 2. reduced      Cr6+. oxidation, reduction or neither. 16. P    +      3e-        ----------> TeO. 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