1. Kinetics - analysis Starter…
Ethyl ethanoate reacts with water to form ethanoic acid and Ethanol.
Draw a symbol equation
Determine the number of proton environments and intensities for each compound.
Sketch a low-res nmr
Sketch a high-res nmr
Review question maybe using a mind map on a white board

2. 3
3:2:3
1:4:3

3. 2
3:1
1:1

4. 3
3:2:1
3:4:1

5. 5 week plan single lessons
Week 1 – Measuring rates and orders
Week 2 – Initial rates method
Week 3 – Rate equation
Week 4 – Review of papers
Week 5 – Rates CPAC
If you miss a session you MUST download the PowerPoint from the shared area and collect associated materials, this is your responsibility.
You must complete all homeworks or you will not be allowed onto Y13 chemistry. No excuses

6. Task
Your task is to confirm that the reaction is first order with respect to H2O2 by using one of two methods.
Method 1
Set up the experiment as shown by your teacher.
Place 5cm3 of 0.98M H2O2 into the flask and connect the collection hose.
Add a small amount of MnO2 catalyst ensuring that the stopper is replaced quickly.
Time how long it takes for 50cm3 of O2 to be collected.
Repeat with 1.96M, 2.94M and 3.96M
Method 2
Set up the experiment as shown by your teacher.
Place 5cm3 of 0.98M H2O2 into the flask and connect the collection hose.
Add a small amount of MnO2 catalyst ensuring that the stopper is replaced quickly.
Record the volume of O2 every 10s until 50cm3 is collected
Repeat 2x more.

7. Tables
Your task is to confirm that the reaction is first order with respect to H2O2 by using one of two methods.
Method 1
Time
(s)
vol O2
(cm3)
[H2O2]
(mol dm-3)
Rate
([H2O2] s-1) 10 20 30 40 50
[H2O2]
(mol dm-3)
Time
(s)
rate
(s-1)
0.98
1.96
2.94
3.92

8. Processing Use the excel file to process your results. Method 1
Plot a graph of time vs concentration.
Use the half life method to calculate the order.
Calculate 1/t to get the rate.
Plot concentration vs rate.
Use the shape to determine the order.
Method 2
Plot a graph of time vs concentration.
Use the half life method to calculate the order.
Calculate the gradient every 10 seconds
Plot concentration vs rate.
Use the shape to determine the order.

9. What order is the reaction overall?
Hydration of ethyl ethanoate
CH3COOCH2CH3 + H2O ⇌ CH3COOH + CH3CH2OH or
C4H8O2 + H2O ⇌ C2H4O2 + C2H6O
What order is the reaction overall?
What method would we use?

10. Rate equation
Consider the reaction aA + bB  products

11. Rate equation
If we know the initial concentration and the initial rate… we can work out k.

12. Order determination
Your task is to determine the overall order of reaction for the forwards and reverse reaction and then write the rate equation for both reactions

13. Order determination C4H8O2 + H2O ⇌ C2H4O2 + C2H6O Forwards
r = k [C4H8O2]2 [H2O]0
Backwards
r = k [C2H4O2]1 [C2H6O]1