Worksheet: Reaction Quotients

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?

  • A๐‘„c = [NH][NH][OH]34+โ€“
  • B๐‘„c = [][][]NHHNH2++3
  • C๐‘„c = [][][]NHOHNH4+โ€“3
  • D๐‘„c= [][][]NHNHOH34+โ€“
  • E๐‘„c = [][][]NHNHH32++

Q2:

What is the correct expression of the reaction quotient for the reaction shown? CuSOยท5HO()CuSO()+5HO()4242ssg

  • A๐‘„=[]c2HO๏Šซ
  • B๐‘„=[][][]c4242CuSOHOCuSOยท5HO๏Šซ
  • C๐‘„=1[]c2HO๏Šซ
  • D๐‘„=[][][]c4242CuSOยท5HOCuSOHO๏Šซ
  • E๐‘„c2=[HO]

Q3:

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

  • A๐‘„=[][][]c242COCHO๏Šจ
  • B๐‘„=[][][]c242COCHO
  • C๐‘„=[][][]c422CHOCO๏Šจ
  • D๐‘„=[][][]c422CHOCO
  • E๐‘„=[][][]c422CHOCO๏Šจ

Q4:

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

  • A๐‘„c2=[Br][Br]
  • B๐‘„=[][]c2BrBr๏Šจ
  • C๐‘„=[][]c2BrBr
  • D๐‘„c22=[Br][Br]
  • E๐‘„=[][]c2BrBr๏Šจ

Q5:

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

  • A๐‘„c410425=[PO][P][O]
  • B๐‘„=[][][]c41042POPO๏Šซ
  • C๐‘„=1[][]c42PO๏Šซ
  • D๐‘„c425=[P][O]
  • E๐‘„=[][][]c42410POPO๏Šซ

Q6:

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

  • A๐‘„c23=[BaO][SO][BaSO]
  • B๐‘„=[][][]c23BaOSOBaSO
  • C๐‘„=1[]c2SO
  • D๐‘„c2=[SO]
  • E๐‘„=[][][]c32BaSOBaOSO

Q7:

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

  • A๐‘„=[][][]c223SOOSO๏Šจ๏Šจ
  • B๐‘„=[][][]c322SOSOO๏Šจ๏Šจ
  • C๐‘„=[][][]c322SOSOO
  • D๐‘„=[][][]c223SOOSO
  • E๐‘„c223=[SO][O][SO]

Q8:

What is the correct expression of the reaction quotient for the reaction shown? N()+O()2NO()22ggg

  • A๐‘„=[][][]c22NONO๏Šจ
  • B๐‘„=[][][]c22NONO๏Šจ
  • C๐‘„c222=[N][O][NO]
  • D๐‘„=[][][]c22NONO
  • E๐‘„=[][][]c22NONO

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. H()+I()2HI()22ggg Given this information, what is the equilibrium constant for this reaction?

Q10:

What is the correct reaction quotient for the reaction shown? CH()+Cl()CHCl()+HCl()423gggg

  • A๐‘„=1[][][][]c342CHClHClCHCl
  • B๐‘„=[][][][]c342CHClHClCHCl
  • C๐‘„=[][][][]c423CHClCHClHCl
  • D๐‘„=[][][][]c342CHClHClCHCl

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