Question

Equilibrium!!! need an explanation please

Answer 1

this is the question
im having hard time in getting it T_T

Answer 2

@Vincent-Lyon.Fr @aaronq @Kainui @chmvijay

Answer 3

Contemplate the consequences of all four actions, and see if it depletes one side or the other.
The equilibrium will react accordingly.

Answer 4

the thing is that don't get all these actions
i mean what it leads to

Answer 5

the only thing i think is that C is not gonna favour V2+ production

Answer 6

the rest i don't know..

Answer 7

@Kainui please help here T_T

Answer 8

Sure, so what's your reasoning behind why C is not going to favor V2+ production? We can go from there fairly easily since they all have a similar thought process going on.

Answer 9

@Kainui well i think that even if we allow H to escape its not gonna effect V2+ because H is on the product side, thus product side will decrease so the equilibrium will rather favour the production of products then reactants

Answer 10

Yeah, perfectly right. Can you try to see how any of the others might be doing something similar to cause the equilibrium to shift around? Just brainstorm a little and throw out ideas. What might happen? We can reason it out together. =)

Answer 11

@Kainui hmmmm adding acid part
mm well i don't really get it but, i think if acid is added to the reactant side then it would rather favour production of H
or if to product side then it would favour production of water
i guess?

Answer 12

Yeah, I think adding acid would make it react with the Hydroxide to create more water which causes there to be more on the product side. That'll cause the reaction overall to want to go to the right I think.

What about B? In your reasoning for C you said that a loss in H2 gas will cause there to be less product so the reactants will react more to create even more product to shift it to the right. Similarly, if the V3+ is precipitating out of solution it's no longer in the equilibrium so it's going to be forced to the right again!

Since the right hand side has that Hydroxide, remember that OH is a base. Another word for basic solution is alkaline solution. So making the solution more basic will make it as though there is more product than reactant causing the equilibrium to shift from right to left like we want.

Answer 13

This really just comes down to Le Chatlier's Principle. Whatever you add, the solution will try to counter it. So if you add an acid, it's going to favor the making of a base. If you add a base it will try to make more acid and get rid of bases in solution to make it more neutral.

Answer 14

owhhh i get it now!!!! so thats why making solution more alkaline would favour production of V2+, basically increasing OH- on the product side cases equilibrium to shift to the left
yeah coool finally i got to understand it!!
thank u sooooo much!!! @Kainui

Answer 15

Yeah! Not too bad once you understand haha. Glad I could help! =)