Chem_208_Lecture_12_BW - PS 5 Assigned, Due Next Friday...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 PS 5 Assigned, Due Next Friday Today: Finishing Chapter 15; Starting Ch 16
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Le Chatelier’s Principle When an equilibrium system is perturbed, the system responds by partially offsetting the perturbation. e.g. N 2 O 4 (g) 2 NO 2 (g) Δ H = 66.4 kJ Which way does equilibrium shift if: 1. Temperature is increased? N 2 O 4 (g)+ heat 2NO 2 (g) 2. P TOT increased by reducing V? 3. P TOT increased by adding Argon? 4. P NO2(g) decreased by adding O 3 Shifts to right Shifts to left No change Shifts to right
Background image of page 2
3 Iron (III)-Thiocyanate Equilibrium Fe 3+ (aq) + SCN - (aq) FeSCN 2+ (aq) yellow colorless red Mix 0.01M Fe 3+ with 0.01M SCN - 1. Add Fe 3+ 2. Add SCN - 3. Add NaOH - Fe(OH) 3 is insoluble 4. Add Hg 2+ -Hg(SCN) 2 is soluble but undissociated in water 5. Heat up solution (Reaction is exothermic) Observe red FeSCN 2+ Becomes darker red Becomes darker red Becomes less red Becomes less red Becomes less red
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 The Reaction Quotient For the generalized reaction: aA + bB gG +hH [ ] [ ] [] [] b init a init h init g init C B A H G Q = If Q c = K c
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/29/2009 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell University (Engineering School).

Page1 / 13

Chem_208_Lecture_12_BW - PS 5 Assigned, Due Next Friday...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online