All Questions
9
questions
0
votes
1
answer
143
views
Why is phosphoric acid a weak acid?
What is the reason for the phosphoric acid $\ce{H3PO4}$ being a weak acid despite having a structure similar to that of sulfuric acid $\ce{H2SO4}?$
I found some sources claiming that the resonance of ...
- 19
0
votes
1
answer
151
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Problem understanding the rate of reaction of reversible reactions
Case 1:
$$\ce{CH_3COOH + NaOH<=>CH_3COONa + H_2O}$$
At equilibrium, there remain extremely small concentrations of the reactants (acetic acid and sodium hydroxide), and comparatively large ...
- 23
-1
votes
2
answers
2k
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What happens if the filter paper in vacuum filtration is BIGGER than the buchner funnel diameter? [closed]
I’m wondering what would happen if the filter paper in a vacuum filtration process is bigger than the buchner funnel diameter?
I mean would some differences occurs? Or would the whole experiment ...
- 15
5
votes
1
answer
528
views
Using thermodynamics to predict the acid-base character of fluoride ion in water
I was working through the end-of-chapter exercises of the acid-base chapter in Shriver's Inorganic Chemistry when I came across the following problem:
4.7. The effective proton affinity $\ce{A^{'}_{p}...
- 811
0
votes
1
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4k
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Why would the pH of a solution not be 7 at the equivalence point of an acid-base titration? [duplicate]
Is it because the new substance formed might be acidic/basic ?
The internet defines this point as when the number of moles of the acid equals the number of moles of the base. But if we have for ...
- 333
1
vote
0
answers
114
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Is it true that un-dissociated HCl exists in dilute hydrochloric acid?
My book says that the equilibrium constant for $\ce{HCl + H_2O}$ is so high that the reaction goes to completion. But that does not make sense since the existence of an equilibrium constant for this ...
- 333
2
votes
5
answers
22k
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Why does a buffer work best at the pH closest to its pKa?
I think I'm having trouble understanding exactly how the $\mathrm{p}K_\mathrm{a}$ relates here on a conceptual level. For example I know that carbonic acid works somewhat well as a buffer at $\mathrm{...
- 29
1
vote
1
answer
4k
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Do acids without hydrogen taste sour?
I have heard that acids taste sour because of hydrogen (I don't really know exactly). According to the definition of acids:
An acid (from the Latin acidus/acēre meaning sour) is a chemical ...
- 2,356
13
votes
3
answers
9k
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How can the equilibrium shift, while Kc remains constant?
Consider the following reversible reaction.
$$\ce{Cr2O7^2-(aq) + H2O(l) <=> 2 CrO4^2-(aq) + 2 H+(aq)}$$
What will happen to the position of equilibrium and the value of $K_c$ when more $\ce{H+}$ ...
- 557