Electrochemistry some concepts Reduction halfreaction Oxidizing agent e
- Slides: 17
Electrochemistry: some concepts Reduction halfreaction Oxidizing agent + νe- → Reducing agent Oxidant + νe- → Reductant Ox + νe- → Reducing agent → Oxidizing agent + νe- Oxidation halfreaction Reductant → Oxidant + νe. Red → Ox + νe- 1
Electrochemistry: some concepts Reduction halfreaction Total Oxidizing agent + νe- → Reducing agent Oxidant + νe- → Reductant Ox + νe- → Red Ox 1 + Red 2 + νe- → Red 1 + Ox 2 + νereaction Ox 1 + Red 2 → Red 1 + Ox 2 Reduction 1 Oxidation 2 5 x + 2
Electrochemistry: some concepts Ox 1 + Red 2 → Red 1 + Ox 2 But what about the reverse reaction? Red 1 + Ox 2 → Ox 1 + Red 2 Ox 2 + Red 1 → Red 2 + Ox 1 Electrochemical Equilibrium reaction → Will it run spontaneously to the right or to the left? → Where lies the equilibrium? 3
Consider the problem in an electrochemical cell -V Pt forms a ‘driving force’ + for the reaction, like Pt 4
Consider the problem in an electrochemical cell -V Pt forms a ‘driving force’ + for the reaction, like Pt Equilibrium: Relation between and 5
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Electrochemical cells 7
Standard Electrochemical Potentials EΘ (@ 298 K) alphabetical order (Ed. 11: Table 6 D. 1 b) for all T(aq) 8
Standard Electrochemical Potentials EΘ (@ 298 K) electrochemical order (Ed. 11: Table 6 D. 1 a) 9
Standard Thermodynamic data (@ 298 K) (Ed. 11: Table 2 C. 7) for all T(aq) 10
Standard Thermodynamic data (@ 298 K) (Ed. 11: Table 2 C. 7) 11
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Why p. H is defined via the activity 13
Why p. H is defined via the activity 14
Why p. H is defined via the activity Mixture with components A, B, C, …. . Definition of activity: 15
Activity as an effective concentration ideal or dilute behaviour deviation from ideal Molarity (mol/L): activity coefficient on the concentration scale 16
Alternative activity coefficients Molarity (mol/L): Molality (mol/kg): Mole fraction (): 17
- Reducing agent vs oxidizing agent
- Oxidizing agent
- Standard potential table
- Half reaction
- Oxidizing agent artinya
- Chlorine oxidizing agent
- How to identify the oxidizing agent
- Milady chapter 20 vocabulary
- Peas for interactive english tutor
- Agent function vs agent program
- Differentiate between oxidizing and reducing agents
- Relative strength of oxidizing and reducing agents
- Introduction to statistics and some basic concepts
- Sometimes you win some
- Some say the world will end in fire some say in ice
- Ice cream uncountable
- They say it only takes a little faith to move a mountain
- Some may trust in horses