[Siyath]

the equilibrium shown below was anaylzed and found to contain 1.4 moles of SO₂(g),2.5 moles of NO₂(g), 5.2 moles of SO₃(g), and 6.4 moles of NO(g) in a 2.0L container. How many moles of SO₂(g) would have to be added to increase the equilibrium concentration of SO₃(g) to 2.8 mol/L?

[Albert]

Mmm, this problem looks familiar. 

Well ,I would use the following scheme to solve it:

Chemical reaction: a A + b B <--> m M + n N

Initial molarities: C_a    C_b <--> C_m    C_n

Final molarities:   C_a-x   C_b-(b/a)x <--> C_m+(m/a)x  C_n+(n/a)x

[mrdeadman]

this is weird.

the equilibrium shown below was anaylzed and found to contain 1.4 moles of SO₂(g),2.5 moles of NO₂(g), 5.2 moles of SO₃(g), and 6.4 moles of NO(g) in a 2.0L container. How many moles of SO₂(g) would have to be added to increase the equilibrium concentration of SO₃(g) to 2.8 mol/L?

increase the [SO₃] to 2.8 from 5.2? i don't get it.

[mike]

increase the [SO3] to 2.8 from 5.2? i don't get it.

Don't forget that it is in a 2L container (not 1L)

[mrdeadman]

dam, it's mol/L not moles.  sorry about that.

[mrdeadman]

ICE it.