CH 101 notes 11-9

CH 101 notes 11-9 - Separate the following net redox rxn...

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

View Full Document Right Arrow Icon
Separate the following net redox rxn into half rxns Cu 2+ (aq) + 2e- Æ Cu(s) Fe(s) + Æ Fe 2+ (aq) + 2e- Reduction 1/2 rxn Oxidation 1/2 rxn Fe(s) + Cu 2+ (aq) Æ Cu(s) + Fe 2+ (aq) Orbital E Fe(s) Cu 2+ Fe 2+ Cu(s) Section 11.3 Where did the energy go that was given off? V Galvanic cell: Electrochemical cell in which electrons transfer spontaneously through an external circuit. chemical energy electrical energy converted into () Cu 2+ (aq) + 2e- Æ Cu(s) Reduction compartment Cu Cu 2+ Fe(s) + Æ Fe 2+ (aq) + 2e- Fe Fe 2+ Oxidation compartment Liquid junction Potential - + Orbital E Cu 2+ Hi Lo Section 11.3 V Galvanic cell: Electrochemical cell Cu 2+ (aq) + 2e- Æ Cu(s) Fe(s) + Æ Fe 2+ (aq) + 2e- Cu Fe Reduction compartment Oxidation compartment anode cathode Orbital E Cu 2+ Potential + Hi Lo e e e e Salt bridge K Cl Fe 2+ Cu 2+ Cl - K + Section 11.3 V Galvanic cell: Electrochemical cell Cu 2+ (aq) + 2e- Æ Cu(s) Fe(s) + Æ Fe 2+ (aq) + 2e- Cu Fe Cu 2+ Fe 2+ Reduction compartment Oxidation compartment Liquid junction anode cathode e e K Cl Cl - K + Section 11.3 V cat an e e e e E cell = E cat - E an E = E = E f - E i E cell = E cell = + 0.78V E cell > 0 G = - E If E > 0, then G < 0 = + 0.78V –(-0 .44V)±± +0.34V Section 11.3 Cu Cu 2+ Fe Fe 2+ Orbital energy Electrical potential (voltage) lo hi hi lo Cu 2+ (aq) + 2e- Æ Cu(s) +0.34 V 2H 1+ (aq) + 2e- Æ H 2 (g) 0.00V 0.34 V (cell potential) Fe 2+ (aq) + 2e- Æ Fe(s) -0.44 V 0.44 V (cell potential) Section 11.4 Standard Reduction Potentials E cell = = + 0.78V –(-0 .44V)±±
Background image of page 1

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

View Full DocumentRight Arrow Icon
E cell
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.

Page1 / 4

CH 101 notes 11-9 - Separate the following net redox rxn...

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