All Questions
Tagged with equilibrium water
44
questions
4
votes
1
answer
391
views
Is HCl(l) acidic?
If in a reaction mixture HCl is given in liquid phase, will it behave as an acid ?
I know that an aqueous solution of HCl is acidic but am confused about the liquid phase.
- 1,916
0
votes
1
answer
839
views
Why is the ionic product for water $10^{-14}$? [closed]
Why is the reference value of $K_w=10^{-14}\ \mathrm{M}^2$, such that $[\ce{H+}]= 10^{-7}\ \mathrm{M}$ and $[\ce{OH^-}]= 10^{-7}\ \mathrm{M}$ for pure water at $20\ ^\circ \mathrm{C}$?
For example, ...
- 19
10
votes
2
answers
26k
views
Why is water not part of the equilibrium constant?
In the acid base reaction
$$\ce{NH4+ + H2O <-> NH3 + H3O+}$$
the acidity constant, which is a relation between concentrations is given by
$$K_{\mathrm{a}}=\frac {\ce{[NH3]} \cdot \ce{[H3O+]}}{...
- 413
0
votes
0
answers
60
views
Can I freeze water at 100 °C if I add 28 grams NaCl in 100 grams water?
Can I freeze water at 100 °C if I add 28 grams NaCl in 100 grams water at 20 °C?
I found this diagram that says, if I have 28.05 wt% NaCl in water, then the equilibrium temperature between two phases ...
- 99
5
votes
2
answers
370
views
What is the difference between these equations for the Contact process?
Some webpages describe the contact process as this (I left out $\ce{SO2}$, $\ce{SO3}$ production):
$\ce{SO3 + H2SO4 -> H2S2O7}$
After this, it is controllable to add water to the oleum therefore ...
- 59
0
votes
0
answers
176
views
How the heat a large amount of water that is safe to use?
I would like to know how heat up a large amount of water ( assumption : 100 liter ) that people could use to take their bath and also it would not be dangerous even if they accidentally ingested it ? ....
2
votes
2
answers
2k
views
How concentrated can an acid be?
How concentrated can an acid be without it being supersaturated? Is there a certain limit to how concentrated an acid or base can be?
When I mean concentration, I mean molarity; so how concentrated ...
- 3,050
1
vote
3
answers
1k
views
Is this the right conclusion for a thought experiment?
In this thought experiment, let’s consider the surrounding to be air that is composed of entirely water vapor (no other species like $\ce{O2}$ and $\ce{N2}$ are present). The surrounding is infinitely ...
- 133
2
votes
0
answers
43
views
Analytically combining Dynamic Equilibria that have a two way affect?
Lets say I want to model a water system as the following set of equilibria:
$\ce{H2O <=> OH- + H3O+}$ | $\ce{A=[OH^{-}][H3O+]}$
$\ce{CO2 + H2O <=> H2CO3}$ | $\ce{B=\frac{[H2CO3]}{[CO2]}}$...
- 939
3
votes
1
answer
4k
views
Ethanol and water hygroscopic equilibrium concentration
I am working with a company to help improve their reaction process where they use SDA 2B Alcohol (Karl Fischer titration has it at 99.66% EtOH, 0.3375% toluene). Specifically, I am attempting to ...
- 33
4
votes
1
answer
31k
views
Determining standard Gibbs free energy for water?
I am dealing with the dissociation of water into its components hydrogen and oxygen and I am trying to determine the standard Gibbs free energies of each component. My professor said if the substance ...
- 219
1
vote
2
answers
1k
views
Ionic Product of Water
Why is the ionic product for water ($K_\text{w}$) temperature dependent? The concentration of $\ce{H+}$ and $\ce{OH-}$ ions in pure water is $[\ce{H+}] = [\ce{OH-}] = 1.0\times 10^{-7}\ \mathrm{mol/l}$...
25
votes
2
answers
13k
views
Why does water dissociate to H3O+ and OH- rather than H+ and OH-?
Why does water dissociate to
$\ce{H3O+ + OH-}$
instead of $\ce{H+ + OH-}$?
This question came to surface when I was learning about acids and bases, and learned this definition:
$\mathrm{pH=}-\log_{10}[...
- 383
1
vote
0
answers
830
views
Selectivity Coefficients of Ion Exchange Resins - Selectivity Reversal with TDS / Ionic Strength
I'm currently studying ion exchange resins and generally getting a bit stuck on some points of information which I do not fully understand / are not very well explained within the literature.
I ...
- 11