Breathalyzer - School District 67 - Okanagan Skaha

Document Sample
Breathalyzer - School District 67 - Okanagan Skaha Powered By Docstoc
					                      The Breathalyser Reaction


C2H2OH         +      Cr2O72- →       CH3COOH        +      Cr3+

Ethanol               Orange          Acetic Acid           Green

If the orange colour decreases there is alcohol present. It is measured
with a spectrophotometer. The more it decreases, the higher the blood
alcohol content.

Legal Limit Class 5 Licence           0.08 mg/mL
Legal Limit New Driver                0.00 mg/mL

Substance Oxidized
Substance Reduced
Reducing Agent
Oxidizing Agent
                     The Breathalyser Reaction
Look at the oxidation numbers!
-0.5                  +6              0                     +3

C2H2OH         +      Cr2O72- →       CH3COOH        +      Cr3+

Ethanol               Orange          Acetic Acid           Green

If the orange colour decreases there is alcohol present. It is measured
with a spectrophotometer. The more it decreases, the higher the blood
alcohol content.

Legal Limit Class 5 Licence           0.08 mg/mL
Legal Limit New Driver                0.00 mg/mL

Substance Oxidized
Substance Reduced
Reducing Agent
Oxidizing Agent
                     The Breathalyser Reaction
Look at the oxidation numbers!
-0.5                  +6              0                     +3

C2H2OH         +      Cr2O72- →       CH3COOH        +      Cr3+

Ethanol               Orange          Acetic Acid           Green

If the orange colour decreases there is alcohol present. It is measured
with a spectrophotometer. The more it decreases, the higher the blood
alcohol content.

Legal Limit Class 5 Licence           0.08 mg/mL
Legal Limit New Driver                0.00 mg/mL

Substance Oxidized            C2H2OH
Substance Reduced
Reducing Agent
Oxidizing Agent
                     The Breathalyser Reaction
Look at the oxidation numbers!
-0.5                  +6              0                     +3

C2H2OH         +      Cr2O72- →       CH3COOH        +      Cr3+

Ethanol               Orange          Acetic Acid           Green

If the orange colour decreases there is alcohol present. It is measured
with a spectrophotometer. The more it decreases, the higher the blood
alcohol content.

Legal Limit Class 5 Licence           0.08 mg/mL
Legal Limit New Driver                0.00 mg/mL

Substance Oxidized            C2H2OH
Substance Reduced
Reducing Agent                C2H2OH
Oxidizing Agent
                     The Breathalyser Reaction
Look at the oxidation numbers!
-0.5                  +6              0                     +3

C2H2OH         +      Cr2O72- →       CH3COOH        +      Cr3+

Ethanol               Orange          Acetic Acid           Green

If the orange colour decreases there is alcohol present. It is measured
with a spectrophotometer. The more it decreases, the higher the blood
alcohol content.

Legal Limit Class 5 Licence           0.08 mg/mL
Legal Limit New Driver                0.00 mg/mL

Substance Oxidized            C2H2OH
Substance Reduced             Cr2O72-
Reducing Agent                C2H2OH
Oxidizing Agent
                     The Breathalyser Reaction
Look at the oxidation numbers!
-0.5                  +6              0                     +3

C2H2OH         +      Cr2O72- →       CH3COOH        +      Cr3+

Ethanol               Orange          Acetic Acid           Green

If the orange colour decreases there is alcohol present. It is measured
with a spectrophotometer. The more it decreases, the higher the blood
alcohol content.

Legal Limit Class 5 Licence           0.08 mg/mL
Legal Limit New Driver                0.00 mg/mL

Substance Oxidized            C2H2OH
Substance Reduced             Cr2O72-
Reducing Agent                C2H2OH
Oxidizing Agent               Cr2O72-
Balance in acid solution


C2H2OH        +      Cr2O72- →   CH3COOH   +   Cr3+
Balance in acid solution


C2H2OH        +      Cr2O72- →    CH3COOH   +   Cr3+


              Cr2O72- →    Cr3+

       C2H2OH          →          CH3COOH
Balance in acid solution


C2H2OH        +      Cr2O72- →     CH3COOH   +   Cr3+


              Cr2O72- →    2Cr3+

       C2H2OH          →           CH3COOH
Balance in acid solution


C2H2OH        +      Cr2O72- →   CH3COOH   +   Cr3+


       Cr2O72- →     2Cr3+ + 7H2O

       C2H2OH +      H2 O →      CH3COOH
Balance in acid solution


C2H2OH        +      Cr2O72- →   CH3COOH   +      Cr3+


       14H+ + Cr2O72- +    → 2Cr3+   + 7H2O

       C2H2OH +      H2 O →      CH3COOH   + H+
Balance in acid solution


C2H2OH        +      Cr2O72- →   CH3COOH    +     Cr3+


       14H+ + Cr2O72- + 6e- →    2Cr3+ + 7H2O

       C2H2OH +      H2 O →      CH3COOH    + H+ + 1e-
Balance in acid solution


C2H2OH        +      Cr2O72- →    CH3COOH    +    Cr3+


       14H+ + Cr2O72- + 6e- →     2Cr3+ + 7H2O

       6(C2H2OH +          H2 O   →    CH3COOH+ H+ + 1e-)
Balance in acid solution


C2H2OH        +      Cr2O72- →    CH3COOH    +    Cr3+


       14H+ + Cr2O72- + 6e- →     2Cr3+ + 7H2O

       6(C2H2OH +          H2 O   →    CH3COOH+ H+ + 1e-)


14H+ + Cr2O72- + 6C2H2OH + 6H2O → 2Cr3++7H2O+6CH3COOH+6H+
Balance in acid solution


C2H2OH        +      Cr2O72- →    CH3COOH    +    Cr3+


       14H+ + Cr2O72- + 6e- →     2Cr3+ + 7H2O

       6(C2H2OH +          H2 O   →    CH3COOH+ H+ + 1e-)

8                                       1
14H+ + Cr2O72- + 6C2H2OH + 6H2O → 2Cr3++7H2O+6CH3COOH+6H+
Balance in acid solution


C2H2OH        +      Cr2O72- →    CH3COOH    +    Cr3+


       14H+ + Cr2O72- + 6e- →     2Cr3+ + 7H2O

       6(C2H2OH +          H2 O   →    CH3COOH+ H+ + 1e-)


8H+ + Cr2O72- + 6C2H2OH → 2Cr3+        + 1H2O + 6CH3COOH
Balance in acid solution


C2H2OH        +      Cr2O72- →    CH3COOH    +    Cr3+


       14H+ + Cr2O72- + 6e- →     2Cr3+ + 7H2O

       6(C2H2OH +          H2 O   →    CH3COOH+ H+ + 1e-)


8H+ + Cr2O72- + 6C2H2OH → 2Cr3+        + 1H2O + 6CH3COOH

       +6                              +6
Balance in base solution




8H+ + Cr2O72- + 6C2H2OH → 2Cr3+   + 1H2O + 6CH3COOH
Balance in base solution




8H+ + Cr2O72- + 6C2H2OH → 2Cr3+   + 1H2O + 6CH3COOH

8OH-                       8OH-
Balance in base solution




8H+ + Cr2O72- + 6C2H2OH → 2Cr3+   + 1H2O + 6CH3COOH

8OH-    8H2O                      8OH-
Balance in base solution




8H+ + Cr2O72- + 6C2H2OH → 2Cr3+   + 1H2O + 6CH3COOH

8OH-    8H2O                      8OH-
Balance in base solution




Cr2O72- + 6C2H2OH → 2Cr3 + 1H2O + 6CH3COOH + 8OH-
         7
         8H2O
Balance in base solution




7H2O + Cr2O72- + 6C2H2OH → 2Cr3+ + 6CH3COOH + 8OH-
Review of Cells

Electrochemical                 Electrolytic

Is a power supply               Requires power supply
Spontaneous (+ ve)              Nonspontaneous(-ve)
Makes electricity               Makes chemicals

Reduction is highest on Chart   Reduction is the –ve
For all cells:

Cations migrate to the cathode, which is the site of reduction.

Anions migrate to the anode, which is the site of oxidation.

Electrons travel through the wire from anode to cathode.
Complete the Chart

Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4



Anode:             Reaction:


Cathode:           Reaction:

E0    =
Complete the Chart

Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4



Anode:      Zn     Reaction:


Cathode:    Cu     Reaction:

E0    =

                               Higher on reduction Chart
Complete the Chart

Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4



Anode:      Zn     Reaction: Zn → Zn2+ + 2e-           0.76 v


Cathode:    Cu     Reaction:

E0    =

                               Higher on reduction Chart
Complete the Chart

Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4



Anode:      Zn     Reaction: Zn(s) → Zn2+ + 2e-        0.76 v


Cathode:    Cu     Reaction: Cu2+ + 2e- → Cu(s)        0.34 v

E0    =

                               Higher on reduction Chart
Complete the Chart

Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4



Anode:      Zn       Reaction: Zn → Zn2+ + 2e-          0.76 v


Cathode:    Cu       Reaction: Cu2+ + 2e- → Cu(s)       0.34 v

E0    =     1.10 v

                                Higher on reduction Chart
Electrolytic Cell: Molten AlCl3

Anode:             Reaction:

Cathode:           Reaction:
Electrolytic Cell: Molten AlCl3   Al3+   Cl-

Anode:      C      Reaction:

Cathode:    C      Reaction:
Electrolytic Cell: Molten AlCl3   Al3+   Cl-

Anode:      C      Reaction:

Cathode:    C      Reaction:



Put the vowels together:
Anode
Anion
Oxidation
                                   Oxidation of Anion

Electrolytic Cell: Molten AlCl3        Al3+         Cl-

Anode:      C      Reaction:      2Cl- → Cl2 + 2e-        -1.36 v

Cathode:    C      Reaction:



Put the vowels together:
Anode
Anion
Oxidation
Electrolytic Cell: Molten AlCl3

Anode:      C      Reaction:      2Cl- → Cl2 + 2e-   -1.36 v

Cathode:    C      Reaction:



Put the consonants together:
Cathode
Cation
Reduction
Electrolytic Cell: Molten AlCl3

Anode:      C      Reaction:      2Cl- → Cl2 + 2e-    -1.36 v

Cathode:    C      Reaction:      Al3+ + 3e- → Al -1.66 v



Put the consonants together:
                                         Reduction of Cation
Cathode
Cation
Reduction
Electrolytic Cell: Molten AlCl3

Anode:      C      Reaction:      2Cl- → Cl2 + 2e-   -1.36 v

Cathode:    C      Reaction:      Al3+ + 3e- → Al -1.66 v

E0          =      -3.02 v
Electrolytic Cell: Molten AlCl3

Anode:      C      Reaction:      2Cl- → Cl2 + 2e-   -1.36 v

Cathode:    C      Reaction:      Al3+ + 3e- → Al -1.66 v

E0          =      -3.02 v

MTV =       +3.02 v
Electrolytic Cell: KBr(aq)



Anode:

Cathode:
Electrolytic Cell: KBr(aq)   K+   Br-   H2 O



Anode:      C

Cathode:    C
Electrolytic Cell: KBr(aq)   K+   Br-   H2 O



Anode:      C

Cathode:    C




Put the vowels together:
Anode
Anion or water
Oxidation
Electrolytic Cell: KBr(aq)
                              Oxidation of Anion or Water
                              Take Lower one!


Anode:      C     2Br- → Br2 + 2e-               -1.09 v

Cathode:    C
Electrolytic Cell: KBr(aq)
                               Oxidation of Anion or Water
                               Take Lower one!


Anode:      C     2Br- → Br2 + 2e-                -1.09 v

Cathode:    C




Put the consonants together:
Cathode
Cation or water
Reduction
Electrolytic Cell: KBr(aq)
                               Oxidation of Anion or Water
                               Take Lower one!


Anode:      C     2Br- → Br2 + 2e-                -1.09 v

Cathode:    C     2H2O + 2e- → H2 + 2OH-          -0.41 v


                                Reduction of Cation or Water
                                Take Higher one!

Put the consonants together:
Cathode
Cation or water
Reduction
Electrolytic Cell: KBr(aq)
                              Oxidation of Anion or Water
                              Take Lower one!


Anode:      C     2Br- → Br2 + 2e-               -1.09 v

Cathode:    C     2H2O + 2e- → H2 + 2OH-         -0.41 v

E0    =     -1.50 v
                               Reduction of Cation or Water
                               Take Higher one!
Electrolytic Cell: KBr(aq)
                              Oxidation of Anion or Water
                              Take Lower one!


Anode:      C     2Br- → Br2 + 2e-               -1.09 v

Cathode:    C     2H2O + 2e- → H2 + 2OH-         -0.41 v

E0    =     -1.50 v
                               Reduction of Cation or Water
                               Take Higher one!
MTV =       +1.50 v
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2


Cathode:

Anode:
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2

             *higher
Cathode:     Ag

Anode:
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2

             *higher
Cathode:     Ag           Ag+ + e- → Ag(s)        +0.80 v

Anode:
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2

             *higher
Cathode:     Ag           Ag+ + e- → Ag(s)        +0.80 v

Anode:       Sn
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2

             *higher
Cathode:     Ag           Ag+ + e- → Ag(s)        +0.80 v

Anode:       Sn           Sn → Sn2+ + 2e-         +0.14 v
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2

             *higher
Cathode:     Ag             2(Ag+ + e- → Ag(s))       +0.80 v

Anode:       Sn             Sn → Sn2+ + 2e-           +0.14 v

2Ag+ + Sn → Sn2+ + 2Ag(s)               E0        =   0.94 v

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:86
posted:4/19/2011
language:English
pages:52