Topic: Determining Kp (Equilibrium Constant with respect to partial pressure) for a rea (Read 2352 times)

k4w54r · « **on:** June 30, 2017, 06:39:06 AM »

What will be the Kp for a reaction which includes aqueous substance?

For example:

3NO₂ (g) + H₂O (l)

2HNO₃ (aq) + NO (g)

How can I write Kp for this reaction?

Borek · « **Reply #1 on:** June 30, 2017, 08:55:15 AM »

Quote from: k4w54r on June 30, 2017, 06:39:06 AM

How can I write Kp for this reaction?

You can't.

k4w54r · « **Reply #2 on:** June 30, 2017, 11:33:23 AM »

Borek · « **Reply #3 on:** June 30, 2017, 11:47:29 AM »

Well, you have already realized something is wrong, that's why you asked, no?

In general neither Kp nor Kc "exist" - equilibrium constant is built using activities of substances involved. We can approximate these activities by their pressures and/or their concentrations. Sometimes just concentrations are enough for the approximation, sometimes just pressures are enough, sometimes you have to mix them.

Topic: Determining Kp (Equilibrium Constant with respect to partial pressure) for a rea (Read 2352 times)

k4w54r

Determining Kp (Equilibrium Constant with respect to partial pressure) for a rea

Borek

Re: Determining Kp (Equilibrium Constant with respect to partial pressure) for a rea

k4w54r

Re: Determining Kp (Equilibrium Constant with respect to partial pressure) for a rea

Borek

Re: Determining Kp (Equilibrium Constant with respect to partial pressure) for a rea

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