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Course: AP®︎/College Chemistry > Unit 7

Lesson 5: Calculating equilibrium concentrations
Science
AP®︎/College Chemistry
Equilibrium
Calculating equilibrium concentrations
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Calculating equilibrium concentrations

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Problem

HA2(g)+IA2(g)⇌2HI(g)Kp=90.6at600 K
A rigid vessel initially contains HA2(g) and IA2(g), each at a partial pressure of 1.00 atm at 600 K. The system comes to equilibrium according to the equation above.
Calculate the partial pressure of HI(g) in the vessel at equilibrium at 600 K.
Write your answer using three significant figures.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
atm