Q reaction quotient

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Celine Hoh 2L
Posts: 66
Joined: Fri Sep 28, 2018 12:28 am

Q reaction quotient

Postby Celine Hoh 2L » Tue Jan 22, 2019 8:02 pm

When asked for Q reaction quotient, should we give in terms of pressure or concentration when the chemical equation contains both liquid and gases?

Miriam Sheetz 2B
Posts: 64
Joined: Fri Sep 28, 2018 12:25 am

Re: Q reaction quotient

Postby Miriam Sheetz 2B » Tue Jan 22, 2019 8:32 pm

Liquids are not included in the reaction quotient nor the equilibrium k value/expression. If the reaction contains only gases, you will find Q in terms of the partial pressures of the gases.

Jonas Talandis
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: Q reaction quotient

Postby Jonas Talandis » Tue Jan 22, 2019 8:42 pm

As stated above, liquids are not included in Q or K equations. But as for whether to use terms of pressures or concentrations, it depends on the question. It will ask you to find either Kc (conc.) or Kp (pressure). Otherwise, if it gives you values of conc, use them and just find Kc.

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