1. Examine Model 1. a. Write the theoretical chemical reaction that is used in the trials of Model 1. b. If 0.50 M of reactant A reacts, predict the change in concentration of B and C. 2. What variables were changed in the different trials shown in Model 1?

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Chapter1: Chemical Foundations
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Reaction Quotient
How do you predict which direction a reaction will proceed to reach equilibrium?
Why?
When a reaction reaches equilibrium there must be some non-negligible amount of every species in the
reaction, otherwise the reaction cannot react in both directions. Knowing this, it is very easy to predict
whhich direction a reaction will go to reach equilibrium when one of the components of the reaction has
an Ihitial concentration of zero. Many of the problems you have worked with thus far have some compo-
nent at zero concentration, but real life does not work that way. Most of the time, the reaction in question
has some measureable amount of every species, Deciding which way the reaction will go to reach equilib-
rium then becomes more challenging.
Model 1-ATheoretical Equilibrium
Trial 1
A (g) + B (g) C(g)
Trial 2
A (g) + B(g) C(g)
Initial
1.000 M
1.000 M
1.000 M
Initial
2.000 M
0.500 M 0.500 M
Change
Change
Equilibrium
1.464 M
1.464 M
0.536 M
Equilibrium
2.150 M
0.650 M
0.350 M
Trial 3
A (g) + B (g) C(g)
Trial 4
A (g) + B (g) C(g)
Initial
1.000 M
0.500 M
1.500 M
Initial
1.600 M.
1.000 M
0.400 M
Change
Change
Equilibrium
1.864 M
1.364 M
0.636 M
Equilibrium
1.600 M 1.000 M 0.400M
Trial 5
A (g) + B (g) C(g)
Trial 6
A (g) + B(g) C(g)
Initial
1.400 M
1.200 M 0.400 M
Initial
0.750 M
2.000 M 0.250 M
Change
Change
Equilibrium
1.188 M
0.412 M
Equilibrium
0.675 M 1.925 M 0.325 M
1.388 M
1. Examine Model 1.
a. Write the theoretical chemical reaction that is used in the trials of Model 1.
b. If 0.50 M of reactant A reacts, predict the change in concentration of B and C.
2. What variables were changed in the different trials shown in Model 1?
Ouatignt
Transcribed Image Text:Reaction Quotient How do you predict which direction a reaction will proceed to reach equilibrium? Why? When a reaction reaches equilibrium there must be some non-negligible amount of every species in the reaction, otherwise the reaction cannot react in both directions. Knowing this, it is very easy to predict whhich direction a reaction will go to reach equilibrium when one of the components of the reaction has an Ihitial concentration of zero. Many of the problems you have worked with thus far have some compo- nent at zero concentration, but real life does not work that way. Most of the time, the reaction in question has some measureable amount of every species, Deciding which way the reaction will go to reach equilib- rium then becomes more challenging. Model 1-ATheoretical Equilibrium Trial 1 A (g) + B (g) C(g) Trial 2 A (g) + B(g) C(g) Initial 1.000 M 1.000 M 1.000 M Initial 2.000 M 0.500 M 0.500 M Change Change Equilibrium 1.464 M 1.464 M 0.536 M Equilibrium 2.150 M 0.650 M 0.350 M Trial 3 A (g) + B (g) C(g) Trial 4 A (g) + B (g) C(g) Initial 1.000 M 0.500 M 1.500 M Initial 1.600 M. 1.000 M 0.400 M Change Change Equilibrium 1.864 M 1.364 M 0.636 M Equilibrium 1.600 M 1.000 M 0.400M Trial 5 A (g) + B (g) C(g) Trial 6 A (g) + B(g) C(g) Initial 1.400 M 1.200 M 0.400 M Initial 0.750 M 2.000 M 0.250 M Change Change Equilibrium 1.188 M 0.412 M Equilibrium 0.675 M 1.925 M 0.325 M 1.388 M 1. Examine Model 1. a. Write the theoretical chemical reaction that is used in the trials of Model 1. b. If 0.50 M of reactant A reacts, predict the change in concentration of B and C. 2. What variables were changed in the different trials shown in Model 1? Ouatignt
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