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7.04 Equilibrium

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gabriela cardenas

on 21 May 2015

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Transcript of 7.04 Equilibrium

Conclusion: Continued
5)What does the value, or magnitude, of the equilibrium constant (K) tell you about an equilibrium system? Be specific with your answer.
Part one: Data
Part two: Data
Conclusion: Continued
3)How did the calculated ratios of product to reactant compare in the three parts of this activity. Explain, in paragraph form, if these ratios illustrate the concept of the law of mass action and the equilibrium constant of a system.
Part three: Data
Conclusion:
1) Explain in your own words what it means for a chemical system to be in the state of dynamic equilibrium.
7.04 Equilibrium
Gabriela Cardenas
Rounds
Candies on R
Candies on P
o
1
2
3
4
5
6
7
8
9
10
40
20
25
19
15
12
9
7
6
5
4
0
20
15
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24
28
31
33
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35
36
Candies on R:
162
Candies on P:
277
***Ratio = P/R***
277/162= 1.709
Rounds
Candies on R
Candies on P
0
1
2
3
4
5
6
7
8
9
10
50
25
19
15
12
9
7
6
5
4
3
0
25
31
35
38
41
43
44
45
46
47
Candies on P:
Candies on R:
155
395
***Ratio = P/R***
395/155 = 2.55
Rounds
Candies on R
Candies on P
0
1
2
3
4
5
6
7
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9
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12
13
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15
40
20
15
12
9
47
36
27
21
16
12
9
7
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5
4
0
20
25
28
31
33
44
53
59
64
68
71
73
74
75
76
Candies on R:
Candies on P:
286
794
***Ratio = P/R***
794/286= 2.77
-When a chemical system is in the state of dynamic equilibrium, it can be described as the moment when the forward reaction rate is equal to the reverse reaction rate.
2)Describe what you observed in each part of this lab. Do you think that each part of this activity helped illustrate the concepts of equilibrium? Explain your answer completely in paragraph form.
-I, myself, am a visual learner. This activity really helped me visually understand the concept of equilibrium. When observing each part of this lab and all the data collected, I saw how the products increased and the reactants decreased.
-The concept of the law of mass describes a reaction at a given temperature. In this lab, I did not include temperature therefore, the ratios do not illustrate the concept of law of mass. However, the equilibrium is illustrated because of the reversible reactants.
4)What determines when a system reaches equilibrium? What observations can be made about a system once equilibrium has been established?
-A system has reached equilibrium when the forward reaction is equal to the reverse reaction. Thus, from that point of equilibrium, no new product is formed.
-The magnitude of the equilibrium constant (k) provides information for a reaction at a given temperature and used to relate the equilibrium constant. For example, if K is less than one, K<1, than the concentrations will be lower than the reactants. If the K is greater than one, K>1, than the products will be higher concentrated.
6)In real life, a given system can approach equilibrium from different starting points but will still have the same equilibrium constant. How is this possible? Explain your answer in complete sentences.
-The first factor to determine is if the ratio is met. No matter where the system starts, it will reach an equilibrium state.
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