Urgent equilibrium constant help. (1 Viewer)

[Mr_Kap]

I have an exam on tuesday so need to know the equillibrium constant.

I know if K<0.001 then it lies to the left and almost no reaction occurs.
and if K>1000 then it lies to the right and almost goes to completion.

But what if K is between these values?

And i Also saw a question:

K = 19.9 at 25 degrees Celsius. What does K tell you about this equillibrium: HNO3 + H2O <----> H3O+ + NO3-

 

[InteGrand]

I have an exam on tuesday so need to know the equillibrium constant.

I know if K<0.001 then it lies to the left and almost no reaction occurs.
and if K>1000 then it lies to the right and almost goes to completion.

But what if K is between these values?

And i Also saw a question:

K = 19.9 at 25 degrees Celsius. What does K tell you about this equillibrium: HNO3 + H2O <----> H3O+ + NO3-

Those aren't strict values. Just generally, if K is "large", it lies well to the right, and if K is "very small", it lies well to the left. If K is roughly 1, then the equilibrium lies roughly in the middle.

With K = 19.9, it tells you that at this temperature, the equilibrium lies slightly to the right.

 

[Mr_Kap]

Also. What is this business where if Q < K or Q > K, Q=K.

What does this mean?

 

[InteGrand]

Also. What is this business where if Q < K or Q > K, Q=K.

What does this mean?

Read this section: http://chemwiki.ucdavis.edu/Physica...ical_Equilibria/The_Reaction_Quotient#K_vs._Q

 

[Ekman]

Also. What is this business where if Q < K or Q > K, Q=K.

What does this mean?

Equilibrium quotient (otherwise known as Q) just indicates where the equilibrium is currently at, and where it is going to move towards. So when Q < K, the equilibrium is still on the reactants, and will produce more products in order to reach equilibrium. When Q=K, the equilibrium has been reached..

 

[Crisium]

From my notes: