If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Calculating equilibrium concentrations

You might need: Calculator


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