## Initial Concentration Question

Marina Gollas 1A
Posts: 36
Joined: Fri Sep 28, 2018 12:20 am

### Initial Concentration Question

Question:
"Suppose that 3 moles of H2(g) and 6 moles of F2(g) are mixed in a 3L flask. The equilibrium constant (Kc) of the above reaction is 115 at a specific temperature. Calculate the initial concentrations for each chemical species."
Just to clarify, can anyone break it down step by step on how to do this so I can stick it to my head for the final?:) Thank you, sorry if this was a dumb question.

BenJohnson1H
Posts: 68
Joined: Fri Sep 28, 2018 12:17 am

### Re: Initial Concentration Question

"Suppose that 3 moles of H2(g) and 6 moles of F2(g) are mixed in a 3L flask." Using this information, you can plug the moles and liters into concentration=moles/liters.
Thus the initial concentration of H2, [H2] is 1 and the initial concentration of F2, [F2] is 2. These are all initial so products have not been formed yet which means that their concentrations are 0. Hope this helps!:)