• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Chemistry: Post your doubts here!

Messages
42
Reaction score
54
Points
28
Salam everyone

Can anyone please explain why the answer is A?
 

Attachments

  • upload_2017-2-28_2-12-14.png
    upload_2017-2-28_2-12-14.png
    106.9 KB · Views: 18
Messages
260
Reaction score
104
Points
53
Salam everyone

Can anyone please explain why the answer is A?
Use Le Chatelier's Principle for this question.

Le Chatelier's Principle dictates the equilibrium position to shift to one side (product or reactant), in order to counter any effect from changes in state (temperature, pressure, etc.).
In this case, the "state" that has changes is the pressure, which decreases.
Therefore, the equilibrium position needs to go in a direction that tends to raise the pressure back up. So which direction will it go?

Looking at the equation, we can see that 2 mol of reactant turns into 1 mol of product - there is a general decrease in molar amount along the reaction.
This means the forward reaction acts to lower the system's pressure, thus the backward raises it up.

Therefore, the equilibrium position shall shift towards the reactant side, and will make the mixture even more dark brown.
However, the initial state is already dark brown, so there is no visible change.
 
Messages
46
Reaction score
49
Points
28
Please explain Question 5(b), Is this a Ligand exchange reaction?
upload_2017-3-2_20-58-37.png
 

Attachments

  • upload_2017-3-2_20-57-48.png
    upload_2017-3-2_20-57-48.png
    75.6 KB · Views: 2
Messages
52
Reaction score
21
Points
18
whats the vol. capacity of syringe?
n does any1 know whn to use a syringe n whn a downward displacement?
 
Messages
8,477
Reaction score
34,837
Points
698
Messages
3
Reaction score
0
Points
11
[QUOT
Two equilibria are shown below.

reaction I 2X2(g) + Y2(g) gives 2X2Y(g)
reaction II X2Y(g) gives X2(g) + 1/2Y2(g)

The numerical value of Kc for reaction I is 2.

Under the same conditions, what is the numerical value of Kc for reaction II?
Why is the answer 1/root2???
 
Messages
4
Reaction score
0
Points
1
Phosphorus forms a compound with hydrogen called phosphine, PH
3
. This compound can react
with a hydrogen ion, H
+
.
Which type of interaction occurs between PH
3
and H
+
? (9701/12/m/j/15)
 
Top