1. Le Chatelier’s Principle “If a system in equilibrium is subjected to a stress, a change that will offset the stress will occur in the system.”

2. Le Chatelier’s Principle “If a ‘stress’ is applied to a system in equilibrium, the equilibrium condition is upset; a net reaction occurs in that direction which tends to relieve the ‘stress,’ and a new equilibrium is obtained.”

3. In equilibrium

4. Addition to the equilibrium

5. Out of Equilibrium

6. Return to equilibrium Addition to Equilibrium state

7. New Change

8. New Equilibrium

9. Bicarbonate & Carbonic Acid H+HCO 3 - H 2 CO 3

10. New Equilibrium H+HCO 3 - H 2 CO 3

12. H 2 O + CO 2 H + + HCO 3 -

13. In ECF around cells

14. H 2 O + CO 2 H + + HCO 3 - high high In ECF around cells

15. H 2 O + CO 2 H + + HCO 3 - New equilibrium in ECF/ blood

16. H 2 O + CO 2 H + + HCO 3 - Moderate levels moderate levels

17. H 2 O + CO 2 H + + HCO 3 - Breathe out In the lungs

18. H 2 O + CO 2 H + + HCO 3 - In the lungs Equilibrium correcting itself

19. H 2 O + CO 2 H + + HCO 3 - In the lungs

20. H 2 O + CO 2 H + + HCO 3 - Breathe out In the lungs

21. H 2 O + CO 2 H + + HCO 3 - Equilibrium correcting itself

22. H 2 O + CO 2 H + + HCO 3 - New Equilibrium in the lungs and ECF

23. H 2 O + CO 2 H + + HCO 3 - In the blood again