All Questions
6
questions
1
vote
3
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314
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How to decrease the percent of ammonia that is converted to the ammonium ion in water? [closed]
Ammonia is a weak base that reacts with water according to this equation:
NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH −(aq)
Will Fe(NO3)3 decrease the ...
- 129
3
votes
0
answers
546
views
Enthalpy change of chromate-dichromate reaction
I am a uni study doing chemistry. I have taken a little bit in highschool before, but not in a while.
In a (nonassessed) practical, we have to predict how heating a chromate/dichromate solution:
$$\...
- 445
1
vote
2
answers
6k
views
What is the reason for strong acids/bases dissociating in water?
I have read that the actual definition of a strong acid is one which will fully dissociate in water, so please do not turn the problem on its head when answering. It is also my understanding that ...
- 429
13
votes
2
answers
8k
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Why does the ionic product of water remain constant after addition of non-neutral solute?
In my textbook, it is given that the ionic product of water $K_\mathrm{w}$ remains constant even when a non-neutral solute such as an acid is added to it.
$$K_\mathrm{w} = \ce{[H3O+][OH-]}$$
When a ...
- 295
3
votes
1
answer
302
views
Why do strong acids dissociate (almost) fully on a molecular level?
In the Brønsted-Lowry theory, strong acids $\ce{HA}$ dissociate using water and react into hydronium ions and the conjugate bases $\ce{A-}$. However I never understood in the strong acids case what ...
- 163
5
votes
2
answers
3k
views
Calculating approximate pH of polyprotic acids
When I took up ionic equilibria and titrations after a long break, I found it hard to solve the questions regarding pH calculations of polyprotic acds. Consider these two questions as examples:-
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