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 for the ionization of N H 3 in water?

  • A ๐‘„ c = [ ] [ ] [ ] N H H N H 2 + + 3
  • B ๐‘„ c = [ ] [ ] [ ] N H N H O H 3 4 + โ€“
  • C ๐‘„ c = [ ] [ ] [ ] N H N H H 3 2 + +
  • D ๐‘„ c = [ ] [ ] [ ] N H O H N H 4 + โ€“ 3
  • E ๐‘„ c = [ N H ] [ N H ] [ O H ] 3 4 + โ€“

Q2:

What is the correct expression for the reaction quotient for the reaction

  • A ๐‘„ c = [ ] [ ] [ ] C u S O H O C u S O ยท 5 H O 4 2 4 2 5
  • B ๐‘„ c = 1 [ ] H O 2 5
  • C ๐‘„ c = [ ] [ ] [ ] C u S O ยท 5 H O C u S O H O 4 2 4 2 5
  • D ๐‘„ c = [ ] H O 2 5
  • E ๐‘„ c = [ H O ] 2

Q3:

What is the correct expression for the reaction quotient for the reaction

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

Q4:

What is the correct expression for the reaction quotient for the reaction

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

Q5:

What is the correct expression for the reaction quotient for the reaction

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

Q6:

What is the correct expression for the reaction quotient for the reaction

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

Q7:

What is the correct expression for the reaction quotient for the reaction

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

Q8:

What is the correct expression for the reaction quotient for the reaction

  • A ๐‘„ c = [ ] [ ] [ ] N O N O 2 2
  • B ๐‘„ c = [ ] [ ] [ ] N O N O 2 2
  • C ๐‘„ c = [ ] [ ] [ ] N O N O 2 2 2
  • D ๐‘„ c = [ ] [ ] [ ] N O N O 2 2 2
  • E ๐‘„ c = [ N ] [ O ] [ N O ] 2 2 2

Q9:

Consider the reaction H ( ) + I ( ) 2 H I ( ) 2 2 g g g . It is reported that an equilibrium mixture of this reaction system contains the following concentrations of the reacting species: [ H ] 2 = 1 . 1 4 ร— 1 0 โˆ’ 2 M; [ I ] 2 = 1 . 2 ร— 1 0 โˆ’ 3 M; and [ H I ] = 2 . 5 2 ร— 1 0 โˆ’ 2 M. Given this information, what is the equilibrium constant for this reaction?

Q10:

What is the correct reaction quotient for the reaction

  • A ๐‘„ c = [ ] [ ] [ ] [ ] C H C l H C l C H C l 3 4 2
  • B ๐‘„ c = [ ] [ ] [ ] [ ] C H C l C H C l H C l 4 2 3
  • C ๐‘„ c = 1 [ ] [ ] [ ] [ ] C H C l H C l C H C l 3 4 2
  • D ๐‘„ c = [ ] [ ] [ ] [ ] C H C l H C l C H C l 3 4 2

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