All Questions
75
questions
1
vote
1
answer
874
views
Are my protolysis equations right?
We had the task to solve several salts in water and measure the pH value of the solution. After that we should "create" the protolysis equation and to tell about Chemical equilibrium[s].
I get some ...
- 271
5
votes
1
answer
503
views
Can acid mine drainage form acid rain?
Can acid mine drainage form acid rain?
Since normal acid rain is formed via combustion of fossil fuels, the sulphur dioxide and nitrogen dioxide are all in the gas phase, whereas in acid mines the ...
- 637
2
votes
2
answers
12k
views
Diluting acetic acid to obtain a solution of pH 5 [closed]
What percent of a solution needs to be acetic acid for a particular $\mathrm{pH}$? I have 100% acetic acid, and want $1~\mathrm{L}$ of solution with a $\mathrm{pH}$ of 5. I've done some research, but ...
- 37
3
votes
1
answer
2k
views
Weak base titrated with a strong acid
If you have a weak base XOH titrated with a strong monotonic acid, where do you start with that? Would you first have the base react with water and break up and determine how much of it does? Or just ...
- 749
3
votes
0
answers
204
views
How to prevent Tin ions from precipitating as Tin(II,IV) Hydroxides
Alright, so Tin ions in most of it's salts have the propensity to form Tin(II,IV) Hydroxides and then precipitating out of aqueous solutions. What can I throw in the solutions to prevent this? Using ...
- 302
2
votes
2
answers
47k
views
Finding new pH after NaOH added to buffer solution
I have a buffer containing 0.2 M of the acid $\ce{HA}$, and 0.15 M of its conjugate base $\ce{A-}$, with a pH of 3.35. I need to find the pH after 0.0015 mol of $\ce{NaOH}$ is added to 0.5 L of the ...
- 749
10
votes
2
answers
8k
views
Are all solutions of weak acid/bases buffers?
I am having a difficult time understanding what makes a buffer a buffer.
Buffers in my textbook are defined as a solution of a weak acid or base and their conjugate acid/base. So if I were to just ...
- 349
4
votes
1
answer
264
views
Polyprotic acids and bases
I just have a question on how you handle polyprotic bases.
Question:
Show how oxalate ion can be a polyprotic base
My answer:
My question is whether we stop doing the reaction until the oxalate ion ...
- 350
3
votes
1
answer
603
views
Why do acids usually completely react with bases?
When a neutralisation reaction happens, for example, $ \pu{100 mol l^-1}$ of $\ce{HCl}$ with $\pu{100 mol l^-1}$ $\ce{NH_3}$, why does all of the base and acid get converted to salt? Why isn't there ...
- 295
3
votes
1
answer
202
views
Why is the maximal percent concentration of acids similar to their molar mass
Why is the usual percent concentration of a concentrated acid's solution similar to its molar mass?
For example:
...
- 14.4k
0
votes
2
answers
2k
views
Which of the following elements forms a water-soluble, alkaline oxide?
An element burns in oxygen to form a solid oxide which dissolves in water. The pH of the resulting solution is greater than seven. Which one of the following could the element be?
A. sulphur
B. ...
- 849
5
votes
1
answer
2k
views
Byproducts of the neutralisation of hydrochloric acid with sodium hydroxide
Given a 1 M concentration of $\ce{HCl}$ and $\ce{NaOH}$ here are the pHs:
pH of $\ce{HCl}$: 1
pH of $\ce{NaOH}$: 13–14
and of course water has a pH of 7.
Here is a reaction that is most likely to ...
- 2,121
1
vote
3
answers
10k
views
Why is a buffer solution most effective when concentrations of salt and acid are the same?
Why does a buffer work most effectively when the concentration of salt and acid is 1:1?
- 2,423
2
votes
1
answer
92
views
Max Ionization Extent
How is this formula derived? What does it mean; what is the use of this formula?
I know that at infinite dilution, ionization extent should be very high because of Le Chatlier's principle.
But I'm ...
- 19k
4
votes
5
answers
330
views
Is it possible for an acid and base to react to form an even stronger base or acid?
Is there a combination of an acid and a base that when mixed results in a solution that is more basic or more acidic than the initial base or acid, respectively?
If so, do such combinations have a ...
- 151