Questions tagged [equilibrium]
The state in which both reactants and products are present at concentrations which have no further tendency to change with time.
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Temperature dependence on the feasibility of an equilibrium
If we consider a reaction A + B ⟶ C + D, with $\Delta$S $>0$, then regardless of whether $\Delta$H is positive or negative, increasing the temperature will make $\Delta$H - T$\Delta$S more negative,...
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Multiple equilibria
I was reading about multiple equilibria reactions and can't quite comprehend some things.
Suppose we have two reactions:
\begin{align}
\ce{A + B &<=> C + D},& K_\mathrm{eq} &= 10^{20}...
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Derivation of general binding equation (macromolecule with multiple binding sites)
So the last days I'm stuck at trying to solve the an equation - but I just can't (see the screenshot below.
So the idea is that you have a receptor or enzyme with multiple binding sites for a Ligand (...
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Boiling point, pressure, and Gibbs free energy
The water boiling process can be represented by the equation:
$$ \ce{H2O(l) → H2O(g)} \tag{1} $$
Since free energy depends on pressure
$$ \left(\frac{\partial G}{\partial P}\right)_T = V \tag{2} $$
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Van't Hoff graph, the Ka is increasing at a slower rate as temperature increases
I understand the exponential relationship between Ka and temperature, but I had expected it to be curving upwards(because of the $e^x$), and not like a log graph (where y-values increases slower for ...
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Does Hess' law in standard conditions involve consuming all reactants?
The standard free energy change for equilibrium problems is relative to both reactants AND products starting at 1 molar.
Hess’s law takes the sum of the values for products minus the sum of the values ...
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How to convert the uncertainty of my pH probe to the uncertainty of my Ka value
Literally the title. So basically I performed numerous titrations with ethanoic acid sodium hydroxide. I got the full pH curve, and subsequently found the Ka Value of the ethanoic acid. Now here is ...
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Are catalysts considered when assigning type of chemical equilibrium?
So I have very short doubt that whether catalysts are considered when we say that an equilibrium is homogeneous or heterogenous, like in an aqueous equilibrium with only aqueous reactants and products ...
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Van't Hoff Equation isolating for K2
So I wanted to find the theoretical Ka values of acetic acid from 25-65 degrees at 10 degree increments: 25, 35, 45, 55, 65.
I know that the dissociation of acetic acid is endothermic, and when I ...
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Why does a small decrease in [ATP] cause a large increase in [AMP]
I was wondering how the reaction catalysed by adenylate kinase and its equilibrium of approximately 1 leads to [AMP] changing greatly with a small change in [ATP]. The below information was provided ...
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Calculating partial pressure: Difficult cubic equation in bulky Chemical Equilibrium numerical
The problem, which I found in a popular book for Physical Chemistry, written by Neeraj Kumar, is fairly simple, being simply 2 equations and 2 variables, yet its simplification is a nightmare.
$\pu{5 ...
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Why isn't the unit of rate constant for any reaction always per second?
It is formally agreed upon that $K_{eq}=\prod_{j}a_j^{\nu_j}$ where $\nu_j$ is stoichiometric coefficient of species $j$ (negative for reactants and positive for products). This equation results in ...
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Evaluating the density of a gas equilibrium mixture
I'm a beginner in chemistry (first year uni course) and I have this exercise that I need some help with. I don't really know where to start so for now. I've tried random approaches to see what works ...
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Are buffer solution and acidic buffer different? [closed]
I have studied that acidic buffer is a type of buffer solution but the definition of buffer solution says that it's a mixture of a weak acid and its conjugate base or a weak base and its conjugate ...
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Metal hydrolysis and equilbrium constants from stability constants
Problem: I want to create minimum solubility plots for a series of metal hydrolysis species against pH (below). But I cannot reconcile literature stability constants and equilibrium constants.
Context:...
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