discussion on rate of reaction =for quiz 1 and 2
DESCRIPTION
TRANSCRIPT
![Page 1: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/1.jpg)
what is?what is?
Effective collision?Effective collision?
Collision theory?Collision theory?
Factors affecting?Factors affecting?
Activation energy?Activation energy?
Energy level diagram?Energy level diagram?
Rate of reactionRate of reaction
![Page 2: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/2.jpg)
AVERAGE RATE OF REACTION
For the whole exp
From X
min to Y min
On the X min (2nd) ( from 2nd to 1st)
For first x
(3) min( from 0 to
3rd )
![Page 3: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/3.jpg)
b) Example from the graph, determine:i) The average rate of reaction for the
whole experiment =
Total volume of gas Total time taken
![Page 4: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/4.jpg)
0
10
20
30
40
50
60
70
80
0 30 60 90 120 150 180 210 240 270 300
Volu
me
of g
as/
cm3
Time/ s
= 46 = 0.20 cm3 s-1
210
![Page 5: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/5.jpg)
b) Example from the graph, determine:i) The average rate of reaction from 3
minute to 1 minute =
Total volume of gas at 3min -1 minTotal time taken at 3min -1min
![Page 6: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/6.jpg)
0
10
20
30
40
50
60
70
80
0 30 60 90 120 150 180 210 240 270 300
Volu
me
of g
as/
cm3
Time/ s
= 44-25 = 0.13 cm3 s-1
180-60
![Page 7: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/7.jpg)
b) Example from the graph, determine:i) The average rate of reaction for on
the 3rd minute=
Total volume of gas at 3min – at 2min Total time taken at 3min – at 2 min
![Page 8: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/8.jpg)
0
10
20
30
40
50
60
70
80
0 30 60 90 120 150 180 210 240 270 300
Volu
me
of g
as/
cm3
Time/ s
= 44-38 = 0.10 cm3 s-1
180-120
![Page 9: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/9.jpg)
b) Example from the graph, determine:i) The average rate of reaction for for
the first 2 minutes=
Total volume of gas at 2min – at 0min Total time taken at 2min – at 0 min
![Page 10: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/10.jpg)
0
10
20
30
40
50
60
70
80
0 30 60 90 120 150 180 210 240 270 300
Volu
me
of g
as/
cm3
Time/ s
= 38-0 = 0.33 cm3 s-1
120-0
![Page 11: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/11.jpg)
INSTANTANEOUS RATE OF REACTION
( rate of reaction at that time) Draw tangent to the
graph
Y
X
Rate = Y/X
![Page 12: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/12.jpg)
b) Example from the graph, determine:i) The rate of reaction at 120 s
Instantaneous rate of reaction= Draw tangent to the graph
![Page 13: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/13.jpg)
0
10
20
30
40
50
60
70
80
0 30 60 90 120 150 180 210 240 270 300
Volu
me
of g
as/
cm3
Time/ s
= 56 – 20 = 0.176 cm3 s-1
222-18
![Page 14: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/14.jpg)
![Page 15: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/15.jpg)
![Page 16: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/16.jpg)
![Page 17: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/17.jpg)
II
IIII
Volume of gas
Time
• Use positive catalyst• Increase temperature •Increase total surface area (TSA)•Increase conc but not the mole of reactant
• decrease temperature •Decrease TSA•Decrease conc but not the mole of reactant
![Page 18: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/18.jpg)
Example: Sketch curve that would be obtained with the changes below:
originalLower temp
Volume of gas
Time
Lower temperature is used
![Page 19: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/19.jpg)
Example: Sketch curve that would be obtained with the changes below:
original
higher temp
Volume of gas
Time
Higher temperature
![Page 20: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/20.jpg)
Example: Sketch curve that would be obtained with the changes below:
originalBigger size
Volume of gas
Time
Bigger size of reactant is used
![Page 21: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/21.jpg)
Example: Sketch curve that would be obtained with the changes below:
original
Smaller size
Volume of gas
Time
Smaller size of reactant
![Page 22: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/22.jpg)
Example: Sketch curve that would be obtained with the changes below:
original
higher temp
Volume of gas
Time
Higher temperature
![Page 23: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/23.jpg)
Example: Sketch curve that would be obtained with the changes below:
original
With catalyst
Volume of gas
Time
Catalyst was added
![Page 24: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/24.jpg)
Changes to the FLAT part of graph
![Page 25: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/25.jpg)
Example:Curve I represents the result of the experiment using excess zinc powder and 50cm3 of 1.0 moldm-3 dilute hydrochloric acid
I
Volume of gas/ cm3
Time/s
![Page 26: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/26.jpg)
Draw curves when condition change:ORIGINAL: 50cm3 of 1.0 moldm-3 dilute hydrochloric acid Change : 50cm3 of 2.0 moldm-3 dilute hydrochloric acid
ori
Volume of gas/ cm3
Time/s
Change
![Page 27: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/27.jpg)
Draw curves when condition change:ORIGINAL: 50cm3 of 1.0 moldm-3 dilute hydrochloric acid Change : 50cm3 of 0.5 moldm-3 dilute hydrochloric acid
ori
Volume of gas/ cm3
Time/s
Change
![Page 28: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/28.jpg)
Draw curves when condition change:ori :50cm3 of 1.0 moldm-3 dilute hydrochloric acid change : 50cm3 of 0.5 moldm-3 dilute hydrochloric acid
ori
Volume of gas/ cm3
Time/s
change
![Page 29: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/29.jpg)
Draw curves when condition change:ORI : 50cm3 of 1.0 moldm-3 dilute hydrochloric acid change : 20cm3 of 1.0 moldm-3 dilute hydrochloric acid
ori
Volume of gas/ cm3
Time/s
change
![Page 30: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/30.jpg)
Draw curves when condition change:ori: 50cm3 of 1.0 moldm-3 dilute hydrochloric acid change: 25cm3 of 2.0 moldm-3 dilute hydrochloric acid
ori
Volume of gas/ cm3
Time/s
change
![Page 31: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/31.jpg)
1. The effect of size of reactant
•Reducing the size of reactant
•increases the Total Surface Area
•increases the frequency of collisions between particles
•Increase the rate of reaction.
•Increase the frequency effective collisions between particles
![Page 32: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/32.jpg)
2. The effect of temperature
•Increase the temperature of solution
•increase the kinetic energy of particles
•increase the frequency of collisions between particles
•Increase the rate of reaction.
•Increase the frequency effective collisions between particles
![Page 33: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/33.jpg)
3. The effect of concentration•Increase the concentration of solution
•increase the number of particles per unit volume
•increase the frequency of collisions between particles
•Increase the rate of reaction.
•Increase the frequency effective collisions between particles
![Page 34: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/34.jpg)
4. The effect of catalyst
•Catalyst provides alternative route
•That has a lower activation energy
•Increase the rate of reaction.
•So more particles have energy equal or greater than activation energy.
•Number of effective collisions increase.
![Page 35: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/35.jpg)
exothermic reaction
![Page 36: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/36.jpg)
Activation energy with catalyst
Activation energy no catalyst
reactant
![Page 37: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/37.jpg)
Write chemical equation ( 9m)•Calcium carbonate and hydrochloric acid ( 2m)
OHCO
CaClHClCaCO
22
23 2
![Page 38: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/38.jpg)
Write chemical equation ( 9m)•Sodium thiosulphate and sulphuric acid( 2m)
OHSOSOSNa
SOHOSNa
2242
42322
![Page 39: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/39.jpg)
Write chemical equation ( 9m)•Decomposition of hydrogen peroxide ( 2m)
2222 22 OOHOH
![Page 40: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/40.jpg)
What is the catalyst used in the decomposition hydrogen peroxide?(1m)
Manganese (IV) oxide
![Page 41: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/41.jpg)
Write ionic equation for Sodium thiosulphate and sulphuric acid (2m)
OHSOSOSNa
SOHOSNa
2242
42322
OHSOS
HOS
22
232 2
![Page 42: Discussion on rate of reaction =for quiz 1 and 2](https://reader035.vdocuments.net/reader035/viewer/2022062613/5452cca5af7959ed5f8b77ef/html5/thumbnails/42.jpg)
End