All Questions
Tagged with equilibrium kinetics
115
questions
2
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1
answer
1k
views
The effect of dilution on the rate of a system in equilibrium
I'm attempting to answer a question from my textbook, however the answer that the textbook provides doesn't make sense to me.
The question:
Laura, a VCE chemistry student, loves graphs and wanted to ...
- 35
-1
votes
1
answer
507
views
Sequential reaction in equilibrium
Derive an equation for the steady-state rate of the sequence of reactions $$\ce{A <=> B <=> C <=> D}$$ with $[\ce{A}]$ maintained at a fixed value and the product $\ce{D}$ removed as ...
4
votes
0
answers
74
views
Decomposition of Hydrogen Peroxide Catalysed by Potassium Iodide in Basic Solution
As part of my high school project, I had to measure the initial rate of decomposition of hydrogen peroxide catalysed by potassium iodide at different pHs. At higher pHs (alkaline conditions), I found ...
- 41
1
vote
1
answer
522
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Equilibrium constant of a reaction whose order of forward and reverse reaction is not same
Suppose, a reaction is like,
$$\ce{aA + bB <=> cC + dD}$$
and that A, B, C, D all are gas.
Now it is known that:
$$K_c = \dfrac{[A]^a[B]^b}{[C]^c[D]^d}$$
Now if the forward reaction is second ...
- 13
-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
1
vote
2
answers
220
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Can reversible reactions proceed by different mechanisms in the forward and reverse directions? [closed]
It seems odd to me that this would be the case, but it also seems odd that it wouldn't.
Imagine a mechanism for a (forward) reaction that includes a slow reversible step and a fast irreversible step:
...
- 11
1
vote
1
answer
59
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how to derive equilibrium concentrations from initial conditions for mass action reactions?
I am reading a tutorial on biochemical reactions and mass action kinetics (https://www.math.utah.edu/~keener/books/control.pdf, pp. 1-2) and would like to derive an analytic solution to confirm ...
- 13
-3
votes
1
answer
104
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Wiki’s explanation of the rate of chemical reaction [closed]
Could you please help me understand the Wiki’s explanation of the rate of chemical reaction?
It says: the rate of the chemical reaction is directly proportional to the product of the activities or ...
- 71
5
votes
1
answer
403
views
Common Ion Effect - Ionic Equilibrium
Question
In which of the aqueous solutions of the following, dissociation of $\ce{NH4OH}$ will be minimum?
A) $\ce{NaOH}$
B) $\ce{H2O}$
C) $\ce{NH4Cl}$
D) $\ce{NaCl}$
My Thoughts
My book says that ...
- 309
4
votes
1
answer
1k
views
Equilibrium constant for heterogeneous equilibria having aqueous as well as gaseous reactants
Suppose we have a heterogenous equilibrium :
$$\ce{A(aq) +B(aq) <=> C(g) +D(aq)}$$
Which equilibrium constant is used here?
Both pressure and concentration terms are there. So, according to me, ...
- 487
1
vote
0
answers
153
views
How can I analytically calculate the rate of thermal decomposition of calcium carbonate?
I am a first-time poster on Chemistry StackExchange, and not much of a chemist.
I'm trying to determine the rate of thermal decomposition (in mol/s) of calcium carbonate ($\ce{CaCO3}$) at various ...
1
vote
1
answer
604
views
Why does a first order reaction only depend on the concentration of a single reactant?
I am new to kinetics so please explain it from basic, If there is a reaction -
$$\ce{A + B + C -> D}$$
In first order reaction rate is given by-
$\mathrm R = k[\mathrm A]$ or $\mathrm R = k[\...
- 113
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
737
views
How do we know a reaction is in equilibrium?
In teaching secondary science equilibrium, how can we actually show there is a backwards reaction occurring during equilibrium rather than no reaction. A lot of equilibrium experiments involve ...
- 39
2
votes
1
answer
588
views
Chemical equilibrium — why multiplication, rather than addition? [duplicate]
Why do we multiply (and not take the sum) the concentration of products and reactants when more than one entity is present in either side and rise the power to the coefficient term?
Suppose either
$$...
- 55