Have an account?
Skip to Content
Build your own quiz
Suggestions for you
.png)
32 questions
Show Answers
See Preview
- 1. Multiple Choice
Given the Kc for a forward reaction, how can you find Kc for the reverse reaction?
Divide Kc by 1
Divide 1 by Kc
Square Kc
Take the square root of Kc
- 2. Multiple ChoiceFor the reaction...
SO2 + O2 <−> SO3
If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.leftrightleft and rightneither left nor right - 3. Multiple Choice
For the reaction...
heat + N2 + O2 ↔ 2NO
If heat is added to the chemical system, the equilibrium will shift _______.
left
right
left and right
neither left nor right
- 4. Multiple Choice
2SO2(g)+O2(g)⇌2SO3(g)
Decreasing the volume of container will
shift equilibrium right
shift equilibrium left
change K
have no change
- 5. Multiple ChoiceFor the reaction...
N2 + O2 <=> 2NO
If O2 is removed, the concentration of N2 will _______.increasedecreaseremain the samedouble - 6. Multiple Choice
The following reaction :
SO2 (g) + NO2 (g) <=> SO3 (g) + NO (g)
had reached a state of equilibrium, was found to contain
0.40 mol L-1 SO3 , and 0.30 mol L-1 NO,
0.15 mol L-1NO2 , and 0.20 mol L-1 SO2.
Calculate the equilibrium constant for this reaction.
4.0
0.42
0.25
1.0
- 7. Multiple ChoiceWhat are the two factors to look for when determining if the reaction is at equilibrium?Forward reaction rate is faster than the reverse and concentrations are equalForward and reverse reaction rates are equal and concentration is conctantForward and revers reaction rates are equal and concentration is equalForward reaction rate is faster than the reverse and concentration is equal
- 8. Multiple ChoiceWhat is [H2O] if K = 1.2,
[CO2] = 0.846M, & [CH4]= 0.0713M?
4CuO(s)+CH4(g)↔CO2(g)+4Cu(s) +2H2O(g)0.101 M0.318 M0.0102 M3.77 M - 9. Multiple ChoiceWhat is the correct equilibrium expression for the following reaction:
2H2O2(aq) ↔ 2H2O(l) + O2(g)[H2O]2[O2] / [H2O2]2[H2O2]2 / [H2O]2[O2][O2] / [H2O2]2[H2O]2 / [H2O2]2 - 10. Multiple Choice
When 0.40 mole of SO2 and 0.60 mole of O2 are placed in an evacuated 1.00–liter flask, the reaction represented below occurs.
2SO2 (g) + O2 (g) ↔ 2SO3 (g)
After the reactants and the product reach equilibrium and the initial temperature is restored, the flask is found to contain 0.30 mole of SO3. Based on these results, the equilibrium constant, Kc, for the reaction is
20
10
6.7
2.0
- 11. Multiple Choice
In which of the following systems would the number of moles of the substances present at equilibrium NOT be shifted by a change in the volume of the system at constant temperature?
CO(g) + NO(g) ↔ CO2(g) + ½N2(g)
N2(g) + 3H2(g) ↔ 2NH3(g)
N2(g) + 2O2(g) ↔ 2 NO2(g)
NO(g) + O3(g) ↔ NO2(g) + O2(g)
- 12. Multiple Choice
H2(g) +I2(g) ↔ 2HI(g)
All gases begin with an initial concentration of 2.0 M. Equilibrium is established, and the concentration of HI is known to be 4.8 M. What is the value of the equilibrium constant?
1.2
2.4
32
64
- 13. Multiple ChoiceWhich of the following shows the correct dissolution reaction for BaCl2?Ba 2+(aq) + Cl2-(aq) -> BaCl2(s)BaCl2(aq) -> Ba 2+(aq) + 2Cl-(aq)BaCl2(s) -> Ba 2+(aq) + 2Cl-(aq)Ba 2+(aq) + 2Cl-(aq) -> BaCl2(s)
- 14. Multiple ChoiceAn unknown salt, M2Z, has a Ksp of 3.3 x 10-9. Calculate the solubility in mol/L of M2Z.2.9 x 10-5 M5.7 x 10-5 M9.4 x 10-5 M3.7 x 10-5 M
- 15. Multiple ChoiceThe molar solubility of PbI2 is 1.52 x 10-3 M. Calculate the value of Ksp for PbI2.3.51 x 10-91.40 x 10-84.62 x 10-61.52 x 10-3
- 16. Multiple ChoiceCalculate the [H+] in a solution that has a pH of 2.73.5.4 x 10-12 M1.9 x 10-3 M2.7 M11.3 M
- 17. Multiple ChoiceWhich of the following is a conjugate acid/base pair?HCl/OCl-H2SO4/SO42-NH4+/NH3H3O+/OH-
- 18. Multiple ChoiceSilver chromate, Ag2CrO4, has a Ksp of 8.96 x 10-12. Calculate the solubility in mol/L of silver chromate.1.31 x 10-4M1.65 x 10-4M2.25 x 10-12M2.08 x 10-4M
- 19. Multiple ChoiceThe pH of a solution at 25ₒC in which [OH-] = 3.9 x 10-5M is:4.413.909.594.80
- 20. Multiple ChoiceThe solubility of CaSO4 in pure water at 0ₒC is 1.14 g/L. The value of the solubility product is8.37 x 10-31.14 x 10-39.15 x 10-27.01 x 10-5
- 21. Multiple ChoiceA weak acid, HF, is in solution with dissolved sodium fluoride, NaF. If HCl is added, which ion will react with the extra hydrogen ions from the HCl to keep the pH from changing?OH-Na+F-Na-
- 22. Multiple ChoiceThe correct mathematical expression for finding the molar solubility (s) of Sn(OH)2 is:2s2 = Ksp2s3 = Ksp4s3 = Ksp8s3 = Ksp
- 23. Multiple ChoiceA substance that ionizes completely in solution isan insulator.a strong electrolyte.a weak acid.a non-electrolyte.
- 24. Multiple ChoiceWhen citric acid is produced by the cells of an orange and dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described as aconcentrated acid.weak acid.dilute acid.strong acid.
- 25. Multiple Choice
Which is the weakest acid?HFHNO2CH3COOHHClO - 26. Multiple ChoiceWhich 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.
- 27. Multiple ChoiceWhat is the equilibrium expression for:
Fe3O4(s) + 4H2(g) <--> 3Fe(s) + 4H2O(g)([Fe]3[H2O]4 ) / ([Fe3O4][H2]4)([Fe3O4][H2]4)/ ([Fe]3[H2O]4)[H2O]4 / [H2]4([Fe][H2O]) / ([Fe3O4][H2]) - 28. Multiple Choice
Consider the following equation: CO(g) + 2H2(g) ⇌ CH3OH(g) + Heat
Which of the factors below would decrease the concentration of CH3OH at equilibrium?
adding CO
incresing H2
decrease in the temperature
increasing the temperature
- 29. Multiple Choice
(Calculator Allowed) What is [H2O] if K = 1.2,
[CO2] = 0.846M, & [CH4]= 0.0713M?
4CuO(s)+CH4(g)↔CO2(g)+4Cu(s) +2H2O(g)
0.101 M
0.318 M
0.0102 M
3.77 M
- 30. Multiple ChoiceWhen Keq > 1,There are more products than reactants when the reaction reached equilibrium.There are more reactant than products when the reaction reached equilibrium.The amount of reactants is equal to the amount of products.
- 31. Multiple ChoiceThe reaction quotient for a system is 7.2 × 102. If the equilibrium constant for the system is 36, what will happen as equilibrium is approached?There will be a net gain in productThere will be a net gain in reactant.There will be a net gain in both product and reactantThere will be no net gain in either product or reactant.
- 32. Multiple Choice
COCl2(g) ⇄ CO(g) + Cl2(g)
APMCQ: COCl2(g) decomposes according to the equation above. When pure COCl2(g) is injected into a rigid, previously evacuated flask at 690 K, the pressure in the flask is initially 1.0 atm. After the reaction reaches equilibrium at 690 K, the total pressure in the flask is 1.2 atm. What is the value of Kp for the reaction at 690 K?
0.2
0.05
0.8
1.0
- Answer choicesTagsAnswer choicesTags