All Questions
Tagged with equilibrium experimental-chemistry
23
questions
1
vote
2
answers
621
views
Can ICE tables give two answers?
I was recently given the question:
The equilibrium constant, K, for the following reaction:
N₂(g) + O₂(g) ↔ 2NO(g)
is 4.00 x 10⁻² at a very high temperature. The reaction is at equilibrium at this ...
-1
votes
1
answer
46
views
What would happen if I increase the pressure and temperature of a gas present in a container
Assume the gas to be a real gas and the container to be made of diamond or anything stronger than that. Take the amount of gas to be 2mL and the pressure is increased with the help of strongest ...
- 11
1
vote
2
answers
386
views
Triple Point of a compound and critical point
Is it necessary for all compounds to have a triple point? Also, how is the triple point determined?
Suppose a substance does not have a triple point, so how do researchers agree on the impossibility ...
- 682
6
votes
3
answers
897
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Does partially/completely removing solid shift the equilibrium?
For the reaction: $$\ce{P4(s) + 5O2(g) <=> P4O10(s)}$$
Let's say the reaction is at equilibrium, and SOME $\ce{P4O10(s)}$ is removed from the reaction. Will that affect equilibrium? My ...
user105067
1
vote
0
answers
39
views
Free on-line dissociation constants
Is there a decent on-line source for dissociation constants for acids and bases as CRC alternative?
This chemistry stackexchange old answer no longer has valid links:
Is there an online database of ...
- 31
0
votes
1
answer
271
views
Why are some weak acid equilibrium approximations invalid in very dilute solutions?
Using two approximations for the dissociation of a weak acid, we can write
$$K_\mathrm{a}= \frac{[\ce{H+(aq)}]^2}{[\ce{HA(aq)}]}$$
One of these two approximations we use is that the concentration of ...
- 209
-3
votes
1
answer
46
views
How does it affect the equilibrium expression if the concentration of any component remains the same?
I am a high school student and I am very confused in Equilibrium expression, My confusion is that "Why we don't write concentration of solids and pure liquids in equilibrium expression?" ...
- 252
0
votes
1
answer
3k
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Calculating numbers of moles at equilibrium given the volume of mixture and initial concentration of reactants [closed]
The equilibrium between three substances, A, B and C Is shown below.
$$\ce{A(g) + B(g) <=> C(g)}$$
Initially there were $\pu{0.1 mol}$ of A and $\pu{0.2 mol}$ of B in the reaction mixture. A and ...
- 107
2
votes
0
answers
1k
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What is the recipe for the Belousov-Zhabotinsky reaction for correct simulation with the Oregonator model? [closed]
For a school project I'm trying to model the Oregonator and perform some experiments with the Belousov-Zhabotinsky reaction. Like predicting the reaction and the swings in concentrations. For that it ...
- 187
3
votes
2
answers
373
views
Can a reactor be operated at both reflux and above atmospheric pressure?
I'm not a chemist by trade so my experience in the lab has probably not been as in-depth as most of you. I've been tasked with investigating a proposed reaction in which an organic mixture (mostly ...
- 41
4
votes
2
answers
2k
views
What does the reaction of hydrogen and iodine to hydrogen iodide look like?
The reaction, $\ce{H2 + I2 <=> HI}$ is often used as an example for equilibrium reactions. It is however a difficult reaction to show in a school laboratory: we are not equipped to work with ...
- 731
1
vote
1
answer
3k
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Can an iodine clock reaction work without using a strong acid?
I'm going to do an iodine clock reaction for a project and we had to submit the materials and safety sheets for the experiment a while ago. I thought I could do one by using hydrogen peroxide, sodium ...
- 11
7
votes
1
answer
3k
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Role of 10-camphor sulfonic acid as a catalyst in protecting group chemistry
I recently did a reaction in the lab where 10-camphor sulfonic acid was used as the catalyst instead of something more conventional like hydrochloric acid or sulfuric acid. Dry acetontrile was used as ...
- 419
1
vote
0
answers
114
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Is it true that un-dissociated HCl exists in dilute hydrochloric acid?
My book says that the equilibrium constant for $\ce{HCl + H_2O}$ is so high that the reaction goes to completion. But that does not make sense since the existence of an equilibrium constant for this ...
- 333
2
votes
0
answers
147
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why do solids and pure liquids have no effect on yield and equilibrium? [duplicate]
There are three parts to my question.
Part one:
Let's assume we have a reversible reaction at equilibrium as follows : Calcium carbonate (solid) goes into calcium oxide(solid) and carbon dioxide(...
- 394