Questions tagged [equilibrium]
The state in which both reactants and products are present at concentrations which have no further tendency to change with time.
1,817 questions
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Does temperature-induced change in the equilibrium constant affect the equilibrium concentrations of products and reactants?
Suppose I have an endothermic reaction with the defined equilibrium constant $K_\mathrm{eq}:$
$$\ce{a A + b B <=> c C + d D}$$
If I increase the temperature, $K_\mathrm{eq}$ increases. Does it ...
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Reconciling experimental ΔH of iron(II) oxidation with silver(I) to a theoretical value
I've been trying to determine $\Delta H$ of the reaction
$$\ce{Ag+(aq) + Fe^2+(aq) <=> Fe^3+(aq) + Ag(s)}$$
experimentally by titrating against potassium thiocyanate at different temperatures (...
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Distinguishing disequilibrium from equilibrium in noble gases
$$\newcommand{\yothree}{y_{0,3}}$$
$$\newcommand{\yofour}{y_{0,4}}$$
$$\newcommand{\tcycle}{t_\mathrm{cycle}}$$
$$\newcommand{\tinlet}{t_\mathrm{inlet}}$$
Background
I'm developing data reduction ...
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Is the degree of dissociation of a reaction fixed throughout the reaction?
The relation of equilibrium constant $K$ and degree of dissociation $\alpha$ is defined as
$$K = \frac{n_0\alpha^2}{V(1 - \alpha)}$$
where $n_0$ is the initial amount of substance and $V$ is the ...
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Dissolving of Mg(OH)2 and its equilibrium principles
It is known that $\ce{Mg(OH)2}$ is slightly soluable in water thus: $\ce{Mg(OH)2 <=> Mg^2+ + 2OH^-}$.
When a weak or strong acid is added $\ce{H^+}$ ions combines with $\ce{OH^-}$ ions to form ...
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Why use external pressure in integration when both external and internal cause the movement of piston? [duplicate]
I had a conceptual doubt while I was learning thermodynamics.
In the expression for work done we write
$$
W= -\int P_{ext} dV
$$
But why do we include only $P_{ext}$?
If I take the case of a body ...
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What does thermodynamics have to do with separate biochemical pathways?
Consequently, glycogen biosynthesis and breakdown must occur by separate pathways. Thus we encounter a recurrent metabolic strategy: Biosynthetic and degradative pathways of metabolism are almost ...
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How does pressure influence chemical equilibrium in reactions involving only solids?
According to Le Chatelier’s principle, pressure affects reactions with gases, but what about those with only solids and negligible volume change? Could external pressure influence the thermodynamics ...
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Why does the Hess's law predict that at 25C, acetic acid dissociation is endoethermic, whereas experimental data has it as exothermic?
Why does the Hess's law predict that at 25C, acetic acid dissocition is endoethermic, whereas experimental data has it as exothermic?
Looking at this stackexchange QnA here. That shows that whether ...
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How does metal–metal ion single electrode reach equilibrium?
Suppose I insert a magnesium metal strip into the solution with $c_0(\ce{Mg^2+}) = \pu{2 M}.$ Let $K_c = 1$ for the following reaction:
$$\ce{Mg <=> Mg^2+ + 2 e^-}$$
So, $K_c = [\ce{Mg^2+}].$
...
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Ontology of reaction limiting factors: How to conceptualize all factors that limit the end state of a reaction?
What I'm asking:
Most generally: I want to understand the full picture of things that limit reactions progress to completion breaking down all the things that can limit a reactions ability to reach ...
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Why ignore hydrolysis of bicarbonate in calculations for pH of its buffer solution with carbonate?
Why do we generally ignore hydrolysis of $\ce{HCO3-}$ while calculations for $pH$ of buffer solution of $\ce{CO3^2-}$ and $\ce{HCO3-}$ ?
I was solving some questions and I realised that even when the ...
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How does the salt in a metal - metal insoluble salt - anion electrode buffer the potential of the half cell?
Let us consider an Ag electrode coated in AgCl salt dipped in a Cl- solution. I am trying to understand how this electrode works as the anode in a galvanic cell. I have learned that the salt acts as a ...
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Schlenk equilibrium favored intermediate?
In organomagnesium chemistry, Schlenk equilibrium is essential to learn the reactivity of Grignard reagent. In the same link, I found the following figure which depicts the intermediate favored ...
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Under what conditions do soluble sulphides and sulphates give sulfur?
A post mentions comproportionation without any details.
Notable Reaction (Comproportionation) : $\ce{SO4^2−+H2S⟶S +H2O}$
First of all, can the solvent be water?
If so, how does acidity/basicity ...
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