2A + 3B <----> 2AB The forward reaction points towards the __________.
left
right
up
down
2. Multiple Choice
20 seconds
1 pt
2A + 3B <----> 2AB The forward reaction forms the substance __________.
A
B
AB
A + B
3. Multiple Choice
20 seconds
1 pt
2A + 3B <----> 2AB The reverse reaction forms the substance __________.
A
B
AB
A + B
4. Multiple Choice
30 seconds
1 pt
For the reaction... SO2 + O2 <−> SO3 If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
left
right
left and right
neither left nor right
5. Multiple Choice
20 seconds
1 pt
For the reaction... SO2 + O2 <−> SO3 If the equilibrium shifts to the right, the concentration of O2will ___________.
increase
decrease
remain the same
double
6. Multiple Choice
20 seconds
1 pt
For the reaction... SO2 + O2 <−> SO3 If the equilibrium shifts to the right, the concentration of SO3will ___________.
increase
decrease
remain the same
double
7. Multiple Choice
20 seconds
1 pt
For the reaction... SO2 + O2 <−> SO3 If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.
left
right
left and right
neither left nor right
8. Multiple Choice
20 seconds
1 pt
For the reaction... SO2 + O2 <−> SO3 If the equilibrium shifts to the left, the concentration of SO3will ___________.
increase
decrease
stay the same
triple
9. Multiple Choice
1 minute
1 pt
For the reaction... heat + N2 + O2 <−> 2NO If NO is removed from the system, the concentration of N2 will _______.
increase
decrease
remain the same
double
10. Multiple Choice
20 seconds
1 pt
For the reaction... heat + N2 + O2 <−> 2NO If the heat is added to the chemical system, the equilibrium will shift _______.
left
right
left and right
neither left nor right
11. Multiple Choice
30 seconds
1 pt
For the reaction... heat + N2 + O2 <−> 2NO If the heat is removed to the chemical system, the equilibrium will shift _______.
left
right
both left and right
neither left nor right
12. Multiple Choice
30 seconds
1 pt
For the reaction... heat + N2 + O2 <−> 2NO If the heat is added to the chemical system, the concentration of O2 will _______.
increase
decrease
remain the same
triple
13. Multiple Choice
20 seconds
1 pt
For the reaction... H2 (g) + Cl2 (g) <−> 2HCl (g) + heat If the temperature is cooled, the _________ reaction will be favored.
forward
reverse
forward and reverse
14. Multiple Choice
1 minute
1 pt
For the reaction... N2 (g) + 3 H2(g) <−> 2 NH3 (g)
If the pressure in the system is increased, which substance will increase in concentration?
N2
H2
N2 and H2
NH3
15. Multiple Choice
30 seconds
1 pt
For the reaction... N2 (g) + 3 H2(g) <−> 2 NH3 (g)
If the pressure in the system is decreased, which substance will increase in concentration?
N2
H2
N2 and H2
NH3
16. Multiple Choice
30 seconds
1 pt
Define chemical equilibrium.
A reaction is reversible.
The concentration of the reactants is equal to the concentration of the products.
The rate of a forward reaction is equal to the rate of the reverse reaction.
The reaction stops and no further change in concentration occurs.
17. Multiple Choice
30 seconds
1 pt
Which of the following is NOT true at equilibrium?
The forward and reverse reactions proceed at the same rate.
The concentrations of reactants and products do not change.
The concentration of the reactants is equal to the concentration of the products.
The forward and reverse reactions continue to occur.
18. Multiple Choice
30 seconds
1 pt
The picture shows a reversible chemical reaction taking place. How can equilibrium be reached?
Stopper the flask.
Add more reactants.
Add more products.
Cool the contents.
19. Multiple Choice
30 seconds
1 pt
Which of the following will allow chemical equilibrium to be established?
Gas continually bubbles out of a container.
The reactants and products are all aqueous solutions.
A precipitate forms in the reaction vessel.
The reaction is not reversible.
20. Multiple Choice
30 seconds
1 pt
At what time (in seconds) is equilibrium established?
0 seconds
1 second
5 seconds
10 seconds
21. Multiple Choice
1 minute
1 pt
Which of the two graphs reaches equilibrium?
The left one.
The right one.
Both of them.
Neither.
22. Multiple Choice
30 seconds
1 pt
It is the numerical value of the ratio of product concentrations to reactant concentrations, with each concentration raised to the power equal to its coefficient in the balanced equation.