12
votes
Accepted
Does high pressure reverse reaction between zinc and sulfuric acid?
As a very rough estimation of pressure when the hydrogen redox potential equals zinc standard redox potential, we can use the extrapolation of the Nernst equation:
\begin{align}
E^\circ_\ce{Zn/Zn^2+} &...
- 37.8k
7
votes
Does high pressure reverse reaction between zinc and sulfuric acid?
Any equilibrium calculation involving ordinary compounds that gives a pressure of $10^5$ bar or more is probably not realistic.
Chemical bonds can deform and rearrange under such pressures and thus ...
- 51.2k
3
votes
Rates of a chemical reaction
Equations of reaction rates are based on statistical reasoning about collision frequency, which is supposed proportional to the reaction rate at given temperature.
Imagine
$\pu{1 mmol/L}$ of $\ce{A}$ ...
- 37.8k
2
votes
How strong (molarity) does NaOH solution need to be to saponify fats?
2.5 M might be a bit strong. 1.0 M is 40 g NaOH per liter of water, or around 4% solution.
Start with 1 % solution and leave it soak. As with oven cleaners, a little heat should help move things ...
- 1,088
2
votes
How does Hess' Law work exactly?
The Hess' law is the particular application of the fundamental law of energy conservation, applied to the total enthalpy.
It says the enthalpy change depends only on initial and final state, but not ...
- 37.8k
1
vote
Approximate calculations of the product distribution under kinetic control
Quick Answer
The relative product concentrations are dependent on $\Delta E_a$, $T$, orders, and reversibility of the reactions. It would be inaccurate to specify relative product concentrations ...
- 2,205
1
vote
Approximate calculations of the product distribution under kinetic control
I am afraid you have to use either the Arrhenius or the Eyring equation to get a rough estimate of the product distribution.
If you assume that the pre-exponential terms in either of these equations ...
- 1,013
1
vote
How much can we extend the Finkelstein reaction?
The Finkelstein doesn’t occur on alkyl fluorides because it is an equilibrium $S_N2$ process, and the C–F bond is very strong, so the reaction rate is reduced. You can also think of it as the ...
- 1,217
1
vote
Drano and Bleach reaction?
Both bleach and Drano would coexist well, in fact bleach solutions contain some hydroxide to stabilize them.
Both are washed away by water, so a week interval would separate them, even if they would ...
- 37.8k
1
vote
What is the difference between differential yield and selectivity?
First, these two concepts as you may already know are useful for describing various chemical reactions taking place or multiple reactions. Why Levenspiel wants you to know these concepts? Because you ...
- 2,111
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