Worksheet: Reaction Quotients

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In this worksheet, we will practice defining the reaction quotient of an equilibrium and determining its value from concentrations and partial pressures.

Q1:

Which is the correct reaction quotient expression of the ionization of NH3 in water?

  • A ๐‘„ c = [NH][NH][OH]34+โ€“
  • B ๐‘„ c = [][][]NHHNH2++3
  • C ๐‘„ c = [][][]NHOHNH4+โ€“3
  • D ๐‘„ c = [][][]NHNHOH34+โ€“
  • E ๐‘„ c = [][][]NHNHH32++

Q2:

What is the correct expression of the reaction quotient for the reaction shown?

  • A ๐‘„ c = [][][]CuSOยท5HOCuSOHO4242๏Šซ
  • B ๐‘„ c = [][][]CuSOHOCuSOยท5HO4242๏Šซ
  • C ๐‘„ c = [HO]2
  • D ๐‘„ c = []HO2๏Šซ
  • E ๐‘„ c = 1[]HO2๏Šซ

Q3:

What is the correct expression for the reaction quotient of the following reaction? CH()+2O()CO()+2HO()4222gggl

  • A ๐‘„ = [ ] [ ] [ ] c 4 2 2 C H O C O ๏Šจ
  • B ๐‘„ = [ ] [ ] [ ] c 2 4 2 C O C H O
  • C ๐‘„ = [ ] [ ] [ ] c 4 2 2 C H O C O
  • D ๐‘„ = [ ] [ ] [ ] c 2 4 2 C O C H O ๏Šจ
  • E ๐‘„ = [ ] [ ] [ ] c 4 2 2 C H O C O ๏Šจ

Q4:

What is the correct expression of the reaction quotient for the reaction shown? Br()2Br()2gg

  • A ๐‘„ = [ ] [ ] c 2 B r B r ๏Šจ
  • B ๐‘„ = [ ] [ ] c 2 B r B r ๏Šจ
  • C ๐‘„ = [ ] [ ] c 2 B r B r
  • D ๐‘„ c 2 2 = [ B r ] [ B r ]
  • E ๐‘„ c 2 = [ B r ] [ B r ]

Q5:

What is the correct expression of the reaction quotient for the reaction shown? P()+5O()PO()42410ggs

  • A ๐‘„ c 4 2 5 = [ P ] [ O ]
  • B ๐‘„ = 1 [ ] [ ] c 4 2 P O ๏Šซ
  • C ๐‘„ = [ ] [ ] [ ] c 4 2 4 1 0 P O P O ๏Šซ
  • D ๐‘„ = [ ] [ ] [ ] c 4 1 0 4 2 P O P O ๏Šซ
  • E ๐‘„ c 4 1 0 4 2 5 = [ P O ] [ P ] [ O ]

Q6:

What is the correct expression of the reaction quotient for the reaction shown? BaSO()BaO()+SO()32ssg

  • A ๐‘„ = 1 [ ] c 2 S O
  • B ๐‘„ c 2 = [ S O ]
  • C ๐‘„ = [ ] [ ] [ ] c 3 2 B a S O B a O S O
  • D ๐‘„ = [ ] [ ] [ ] c 2 3 B a O S O B a S O
  • E ๐‘„ c 2 3 = [ B a O ] [ S O ] [ B a S O ]

Q7:

What is the correct expression of the reaction quotient for the reaction shown? 2SO()+O()2SO()223ggg

  • A ๐‘„ = [ ] [ ] [ ] c 2 2 3 S O O S O
  • B ๐‘„ c 2 2 3 = [ S O ] [ O ] [ S O ]
  • C ๐‘„ = [ ] [ ] [ ] c 3 2 2 S O S O O ๏Šจ ๏Šจ
  • D ๐‘„ = [ ] [ ] [ ] c 2 2 3 S O O S O ๏Šจ ๏Šจ
  • E ๐‘„ = [ ] [ ] [ ] c 3 2 2 S O S O O

Q8:

What is the correct expression of the reaction quotient for the reaction shown?

  • A ๐‘„ c = [][][]NONO22
  • B ๐‘„ c = [][][]NONO22๏Šจ
  • C ๐‘„ c = [N][O][NO]222
  • D ๐‘„ c = [][][]NONO๏Šจ22
  • E ๐‘„ c = [][][]NONO22

Q9:

It is reported that an equilibrium mixture of the reaction system shown contains the following concentrations of the reacting species: [H]2 = 1.14ร—10๏Šฑ๏Šจ M, [I]2 = 1.2ร—10๏Šฑ๏Šฉ M, and [HI] = 2.52ร—10๏Šฑ๏Šจ M. Given this information, what is the equilibrium constant for this reaction?

Q10:

What is the correct reaction quotient for the reaction shown?

  • A ๐‘„ c = 1[][][][]CHClHClCHCl342
  • B ๐‘„ c = [][][][]CHClCHClHCl423
  • C ๐‘„ c = [][][][]CHClHClCHCl342
  • D ๐‘„ c = [][][][]CHClHClCHCl342

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