All Questions
Tagged with equilibrium water
44
questions
-2
votes
1
answer
985
views
H2O and Le Châtelier’s principle [duplicate]
According to Le Châtelier’s principle, the adding of a reactant causes a shift in the direction of products, to minimize the modification. But what about $\ce{H2O}$? When can it be considered as a ...
8
votes
1
answer
187
views
What would be different about a heavy-water ocean world?
The water on Earth is primarily made of $\ce{H2O}$. I'm wondering about the conditions in a hypothetical $\ce{D2O}$ ocean world.
Would it be stable over geologic timescales (~$\pu{0.1–2 Ga}$)? What ...
- 317
0
votes
0
answers
66
views
Reason for formation of bubbles at boiling point [duplicate]
As I understand it, boiling takes place when the saturated vapour pressure equals to the atmospheric pressure.
But, why does the vapour pressure need to be equal to the atmospheric pressure for ...
- 465
8
votes
2
answers
2k
views
Why does increasing the pressure cause ice to melt more?
This question was given under chemical equilibrium.
Why does increasing the pressure on this system cause ice to melt more?
$$\ce{H2O(s) <=> H2O(l)}$$
I'm pretty sure this has to be ...
- 5,532
12
votes
1
answer
7k
views
What does “to the left” mean?
However, the concentration of hydronium and hydroxide ions will be very, very small; in fact, the equilibrium that's established in solution lies so far to the left, that only 18 in 1010 molecules of ...
- 423
5
votes
0
answers
479
views
Why does pKw first decrease but eventually increase when temperature rises?
I understand the initial decrease in pKw.
$\ce{Heat + H2O (l) <=> H+ (aq) + OH- (aq)}$
Temperature increases, reaction shifts to the right, so
$\ce{H+} \text{ and } \ce{OH}$ ...
- 2,853
1
vote
1
answer
617
views
Why does pH decrease when diluting a base? [closed]
Take a strong base such a sodium hydroxide
Adding water will result in adding a hydroxide ions as well as hydronium ions to the solution
However if the pH decreases this means that the hydronium ion ...
- 394
-5
votes
1
answer
5k
views
Why does hot water eventually turn cold, and why does cold water eventually turn hot? [closed]
I get cold water from my tap and put it in my water bottle. Over the day as I drink it, the water looses it coldness and slowly becomes warmer.
On the other hand, if I get hot water (maybe I'm sick ...
- 153
1
vote
0
answers
100
views
Is it a coincidence that pKw = 14.00 at SATP?
High school chemistry student here. For our purposes in class for studying acids and bases, we are taught that $\text{p}K_\text{w}=14.00$, which is central for many of our calculations. I assume this ...
- 207
0
votes
1
answer
190
views
Why water won't dissociate more?
In a given sample of water some molecules of water dissociate to give hydronium and hydroxide ion. They say one in 10 million will be dissociated (approx.). What are the reasons behind this? Why water ...
1
vote
0
answers
1k
views
Can water be included in an ICE table if it is not the solvent and is a product?
The question that I have is whether you will count water in a Fischer esterification equilibrium problem where the equation is
carboxylic acid + ethanol --> ethyl acetate + Water
We need to find the ...
- 11
4
votes
1
answer
789
views
Relationship between the water ionization constant and ionic strength
I read in a textbook that
the water ionization constant ($K_\mathrm{w}$) increases as the ionic strength of the solution increases
and it confused me. If the ionic strength increased, then the ...
- 137
0
votes
2
answers
868
views
Ka relating to Dissociation of Weak acid and Water
I am studying $K_a$ currently and there is a passage in the book that doesn't appear to make sense.
It states that from the equation
$$\ce{HA <=> H+ + A-}$$
that $$K_a = \frac{[H^+][A^-]}{[...
- 1,230
10
votes
2
answers
885
views
What kind of 'product' is the 'product' in 'ionic product of water'?
My language has different words for product (=the result of a process) and product (=the sum of multiplied quantities), so I need to know the right meaning to choose the right word.
Which of the ...
- 211
2
votes
1
answer
116
views
The natural equilibrium of water
Why can the equilibrium reaction which exists in water be simply represented as
$$\ce{H2O <=> OH- + H+}$$
rather than
$$\ce{2 H2O <=> OH- + H3O+}$$
Doesn't this change both the ...
- 355