1. LeChatelier’s Principle
April 10, 2018
LeChatelier’s Principle
Kinetics and equilibrium
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

2. Do Now (4 min)
April 10, 2018
Learning target: I can predict the shift in a reaction to re-establish equilibrum by using LeChatelier’s principle Do Now: (Answer on your Do Now Sheet) When you get too hot, what does your body do to cool down? When you get too cold, what does your body do to heat up?
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

3. Announcement
April 10, 2018
Last tutoring of this marking period - Thursday: 3 – 4:30 PM *Check to make sure you have all of your labs in!!!!
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

4. Part A: LeChatelier’s principle
April 10, 2018
Remember, a system (or reaction) at equilibrium is one that has the same rate of the forward reaction as the reverse reaction. EVERYTHING IS IN BALANCE!!!!
explains HOW A SYSTEM _______________ WILL RESPOND TO ________________.
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

5. Stressors How do you deal?
PAIR DISCUSS
April 10, 2018
Stressors How do you deal?
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

6. Shifts
April 10, 2018
• STRESS = Any change in CONCENTRATION, PRESSURE, or TEMPERATURE put upon a system at equilibrium. • When a STRESSOR is added to a system at equilibrium, the system will SHIFT in order to relieve that stress and reach a new equilibrium. • SHIFT = an increase in the RATE of EITHER the forward OR the reverse rxn
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

7. Part B: Shifts
April 10, 2018
Use your pencil to create a balance Equilibrium More on the right More on the left Balanced Too many PRODUCTS Too many REACTANTS How do you make it go back to equilibrium??? If we shift it: Then, the reaction will favor:
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

8. Part C: different types of stresses
April 10, 2018
Read and ANNOTATE the information at the top
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

9. Part C: different types of stresses
April 10, 2018
Adding concentration:
4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g) + HEAT
Adding H2O
is H2O a reactant or product?
so, are products or reactants increasing?
Use your pencil to figure out shift
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

10. Part C: different types of stresses
April 10, 2018
Adding concentration: 4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g) + HEAT Try problems 2-4 in PAIRS 2. If we add O2(g), the system would shift to the _______ and the [NO] would ________. 3. If we add H2O(g), the system would shift to the _______ and the [NO] would ______. 4. If we added NO(g), which concentration(s) would decrease? ____________________.
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

11. Part C: different types of stresses
April 10, 2018
Removing concentration:
4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g) + HEAT
Removing O2
is O2 a reactant or product?
so, are products or reactants decreasing?
Use your pencil to figure out shift
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

12. Part C: different types of stresses
April 10, 2018
Adding concentration: 4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g) + HEAT Try problems 2-4 in PAIRS 2. If we remove water, the system will shift to the _________ and the [NO] will _________________. 3. If we remove ammonia, which concentration(s) will decrease? ______________________________. 4. If we remove NO(g), which concentration(s) would increase? _______________________________.
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

13. Part C: different types of stresses
April 10, 2018
Temperature
A + B  C + D + HEAT A + B + energy  C + D
heat is a _________________ heat is a _______________
circle one: exothermic / endothermic exothermic / endothermic
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

14. Temperature as a stressor
April 10, 2018
In PAIRS, use your understanding of concentration to help you solve: Adding heat: 4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g) + HEAT 1. Is this reaction exothermic or endothermic? _____________________ 2. If we added heat, which concentration(s) will decrease? _____________ 3. If we added heat, which concentration(s) will increase? ______________
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

15. Temperature as a stressor
April 10, 2018
In PAIRS, use your understanding of concentration to help you solve:
Removing heat: CO2(g) + H2O(l) kJ  CH4(g) + 2O2(g)
Is this reaction exothermic or endothermic? ________________________
If we remove heat, which concentration(s) will decrease? _____________
3. If we remove heat, which concentration(s) will increase? _____________
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

16. Pressure as a stressor
April 10, 2018
Recall, pressure affects ____________________ ONLY! So every other state (s, l, aq) in the reaction is UNAFFECTED for this type of stress - INCREASE PRESSURE: rxn shifts to side with _________________ # GAS MOLECULES (or least # moles of gas) - DECREASE PRESSURE: rxn shifts to side with _________________ # GAS MOLECULES (or greater # moles of gas)
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

17. Pressure as a stressor
April 10, 2018
Gas versus other types of physical states: CO2(g)  CO2(aq) Which side of the rxn has more gases? 1. If we increase the pressure, the concentrations of which species will increase? ________________________
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

18. pressure as a stressor
April 10, 2018
In PAIRS, solve questions If we increase the pressure, the concentrations of which species will decrease? ________________________ 3. If we decrease the pressure, the concentrations of which species will increase? ________________________ 4. If we decrease the pressure, the concentrations of which species will decrease? ________________________
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

19. pressure as a stressor
April 10, 2018
Gas molecules on both sides: N2(g) + 3H2(g)  2NH3(g) Which side of your rxn has greater gas molecules? 1. If we increase the pressure, in which direction will the equilibrium shift? (Count moles of gases on each side 1st): ______________________________________
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

20. pressure as a stressor
April 10, 2018
In PAIRS, solve questions If we increase the pressure, the concentration of which species will increase initially? ___________________ 3. If we decrease the pressure, the concentration of which species will decrease initially? __________________ 4. If we decrease the pressure, the concentration of which species will increase initially? __________________
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

21. Work on the following regents questions in PAIRS
Pairwork
April 10, 2018
Work on the following regents questions in PAIRS
Make sure you ANNOTATE the questions as you work.
If not complete, complete for homework. Due tomorrow.
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

22. Due Tomorrow, April 25 Homework
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names

23. April 10, 2018
Exit ticket (3 min)
EXIT TICKET: Complete on a separate sheet of paper
For the following reaction, which way will the reaction shift with an increase in concentration of H2?
3H2 (g) + N2 (g)  2NH3 (g)
Learning Target: I can draw organic compounds from formulas and determine the formula of organic compounds from the names