![Page 1: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/1.jpg)
The Breathalyser Reaction
C2H2OH + Cr2O7
2- → 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/mLLegal Limit New Driver 0.00 mg/mL Substance OxidizedSubstance ReducedReducing AgentOxidizing Agent
![Page 2: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/2.jpg)
The Breathalyser ReactionLook 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/mLLegal Limit New Driver 0.00 mg/mL Substance OxidizedSubstance ReducedReducing AgentOxidizing Agent
![Page 3: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/3.jpg)
The Breathalyser ReactionLook 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/mLLegal Limit New Driver 0.00 mg/mL Substance Oxidized C2H2OH Substance ReducedReducing AgentOxidizing Agent
![Page 4: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/4.jpg)
The Breathalyser ReactionLook 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/mLLegal Limit New Driver 0.00 mg/mL Substance Oxidized C2H2OH Substance ReducedReducing Agent C2H2OH Oxidizing Agent
![Page 5: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/5.jpg)
The Breathalyser ReactionLook 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/mLLegal Limit New Driver 0.00 mg/mL Substance Oxidized C2H2OH Substance Reduced Cr2O7
2-
Reducing Agent C2H2OH Oxidizing Agent
![Page 6: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/6.jpg)
The Breathalyser ReactionLook 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/mLLegal Limit New Driver 0.00 mg/mL Substance Oxidized C2H2OH Substance Reduced Cr2O7
2-
Reducing Agent C2H2OH Oxidizing Agent Cr2O7
2-
![Page 7: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/7.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
![Page 8: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/8.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
Cr2O72- → Cr3+
C2H2OH → CH3COOH
![Page 9: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/9.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
Cr2O72- → 2Cr3+
C2H2OH → CH3COOH
![Page 10: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/10.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
Cr2O72- → 2Cr3+ + 7H2O
C2H2OH + H2O → CH3COOH
![Page 11: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/11.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + → 2Cr3+ + 7H2O
C2H2OH + H2O → CH3COOH + H+
![Page 12: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/12.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + 6e- → 2Cr3+ + 7H2O
C2H2OH + H2O → CH3COOH + H+ + 1e-
![Page 13: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/13.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + 6e- → 2Cr3+ + 7H2O
6(C2H2OH + H2O→ CH3COOH+ H+ + 1e-)
![Page 14: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/14.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + 6e- → 2Cr3+ + 7H2O
6(C2H2OH + H2O→ CH3COOH+ H+ + 1e-)
14H+ + Cr2O72- + 6C2H2OH + 6H2O → 2Cr3++7H2O+6CH3COOH+6H+
![Page 15: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/15.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + 6e- → 2Cr3+ + 7H2O
6(C2H2OH + H2O→ CH3COOH+ H+ + 1e-)
8 114H+ + Cr2O7
2- + 6C2H2OH + 6H2O → 2Cr3++7H2O+6CH3COOH+6H+
![Page 16: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/16.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + 6e- → 2Cr3+ + 7H2O
6(C2H2OH + H2O→ CH3COOH+ H+ + 1e-)
8H+ + Cr2O72- + 6C2H2OH → 2Cr3+ + 1H2O + 6CH3COOH
![Page 17: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/17.jpg)
Balance in acid solution
C2H2OH + Cr2O7
2- → CH3COOH + Cr3+
14H+ + Cr2O72- + 6e- → 2Cr3+ + 7H2O
6(C2H2OH + H2O→ CH3COOH+ H+ + 1e-)
8H+ + Cr2O72- + 6C2H2OH → 2Cr3+ + 1H2O + 6CH3COOH
+6 +6
![Page 18: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/18.jpg)
Balance in base solution
8H+ + Cr2O72- + 6C2H2OH → 2Cr3+ + 1H2O + 6CH3COOH
![Page 19: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/19.jpg)
Balance in base solution
8H+ + Cr2O72- + 6C2H2OH → 2Cr3+ + 1H2O + 6CH3COOH
8OH- 8OH-
![Page 20: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/20.jpg)
Balance in base solution
8H+ + Cr2O72- + 6C2H2OH → 2Cr3+ + 1H2O + 6CH3COOH
8OH- 8H2O 8OH-
![Page 21: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/21.jpg)
Balance in base solution
8H+ + Cr2O72- + 6C2H2OH → 2Cr3+ + 1H2O + 6CH3COOH
8OH- 8H2O 8OH-
![Page 22: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/22.jpg)
Balance in base solution
Cr2O72- + 6C2H2OH → 2Cr3 + 1H2O + 6CH3COOH + 8OH-
7 8H2O
![Page 23: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/23.jpg)
Balance in base solution
7H2O + Cr2O72- + 6C2H2OH → 2Cr3+ + 6CH3COOH + 8OH-
![Page 24: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/24.jpg)
Review of Cells
Electrochemical Electrolytic Is a power supply Requires power supplySpontaneous (+ ve) Nonspontaneous(-ve)Makes electricity Makes chemicals Reduction is highest on Chart Reduction is the –ve
![Page 25: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/25.jpg)
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.
![Page 26: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/26.jpg)
Complete the Chart Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4
Anode: Reaction:
Cathode: Reaction:
E0 =
![Page 27: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/27.jpg)
Complete the Chart Electrochemical Cell: Zn, Zn(NO3)2 II Cu, CuSO4
Anode: Zn Reaction:
Cathode: Cu Reaction:
E0 =
Higher on reduction Chart
![Page 28: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/28.jpg)
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
![Page 29: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/29.jpg)
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
![Page 30: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/30.jpg)
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
![Page 31: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/31.jpg)
Electrolytic Cell: Molten AlCl3
Anode: Reaction: Cathode: Reaction:
![Page 32: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/32.jpg)
Electrolytic Cell: Molten AlCl3 Al3+ Cl-
Anode: C Reaction: Cathode: C Reaction:
![Page 33: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/33.jpg)
Electrolytic Cell: Molten AlCl3 Al3+ Cl-
Anode: C Reaction: Cathode: C Reaction:
Put the vowels together: AnodeAnionOxidation
![Page 34: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/34.jpg)
Electrolytic Cell: Molten AlCl3 Al3+ Cl-
Anode: C Reaction: 2Cl- → Cl2 + 2e- -1.36 v Cathode: C Reaction:
Put the vowels together: AnodeAnionOxidation
Oxidation of Anion
![Page 35: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/35.jpg)
Electrolytic Cell: Molten AlCl3
Anode: C Reaction: 2Cl- → Cl2 + 2e- -1.36 v Cathode: C Reaction:
Put the consonants together: CathodeCationReduction
![Page 36: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/36.jpg)
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: CathodeCationReduction
Reduction of Cation
![Page 37: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/37.jpg)
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
![Page 38: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/38.jpg)
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
![Page 39: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/39.jpg)
Electrolytic Cell: KBr(aq)
Anode: Cathode:
![Page 40: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/40.jpg)
Electrolytic Cell: KBr(aq) K+ Br- H2O
Anode: C Cathode: C
![Page 41: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/41.jpg)
Electrolytic Cell: KBr(aq) K+ Br- H2O
Anode: C Cathode: C
Put the vowels together: AnodeAnion or waterOxidation
![Page 42: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/42.jpg)
Electrolytic Cell: KBr(aq)
Anode: C 2Br- → Br2 + 2e- -1.09 v Cathode: C
Oxidation of Anion or WaterTake Lower one!
![Page 43: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/43.jpg)
Electrolytic Cell: KBr(aq)
Anode: C 2Br- → Br2 + 2e- -1.09 v Cathode: C
Put the consonants together: CathodeCation or waterReduction
Oxidation of Anion or WaterTake Lower one!
![Page 44: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/44.jpg)
Electrolytic Cell: KBr(aq)
Anode: C 2Br- → Br2 + 2e- -1.09 v Cathode: C 2H2O + 2e- → H2 + 2OH- -0.41 v
Put the consonants together: CathodeCation or waterReduction
Oxidation of Anion or WaterTake Lower one!
Reduction of Cation or WaterTake Higher one!
![Page 45: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/45.jpg)
Electrolytic Cell: KBr(aq)
Anode: C 2Br- → Br2 + 2e- -1.09 v Cathode: C 2H2O + 2e- → H2 + 2OH- -0.41 v E0 = -1.50 v
Oxidation of Anion or WaterTake Lower one!
Reduction of Cation or WaterTake Higher one!
![Page 46: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/46.jpg)
Electrolytic Cell: KBr(aq)
Anode: C 2Br- → Br2 + 2e- -1.09 v Cathode: C 2H2O + 2e- → H2 + 2OH- -0.41 v E0 = -1.50 v MTV = +1.50 v
Oxidation of Anion or WaterTake Lower one!
Reduction of Cation or WaterTake Higher one!
![Page 47: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/47.jpg)
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2
Cathode: Anode:
![Page 48: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/48.jpg)
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2
*higher
Cathode: Ag Anode:
![Page 49: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/49.jpg)
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2
*higher
Cathode: Ag Ag+ + e- → Ag(s) +0.80 v Anode:
![Page 50: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/50.jpg)
Electrochemical Cell: Ag, AgNO3 II Sn, Sn(NO3)2
*higher
Cathode: Ag Ag+ + e- → Ag(s) +0.80 v Anode: Sn
![Page 51: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/51.jpg)
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
![Page 52: The Breathalyser Reaction C 2 H 2 OH+ Cr 2 O 7 2- → CH 3 COOH+Cr 3+](https://reader036.vdocuments.site/reader036/viewer/2022081505/56816020550346895dcf2021/html5/thumbnails/52.jpg)
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