All Questions
Tagged with equilibrium acid-base
357
questions
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Which reaction is happening in the preparation of sulfuric acid through contact process?
I've read that in the preparation of $\ce{H2SO4}$ through the Contact process, on the absortion tower, the gas $\ce{SO3}$ is getting in contact with $\ce{H2SO4} (l)$ , because adding $\ce{SO3}$ to $\...
1
vote
1
answer
480
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Acid dissociation constant calculated from the ionization percentage
The question goes like this:
An acid (HX) is 25% dissociated in water. If the equilibrium concentration of HX is $\pu{0.30 M}$, calculate the value of $K_\mathrm{a}$.
So I tried as follows:
if I ...
1
vote
1
answer
262
views
Strongest acid that can exist in water
Fundamentals of Biochemistry: Student Companion: Life at the Molecular Level[1] states that,
The strongest acid that can stably exist in aqueous solutions is $\ce{H3O+}$.
This is restated in the ...
- 27
1
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1
answer
366
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Calculating pH of aqueous ammonium hydrogen sulfide solution
I was doing the following question yesterday:
Calculate the pH of a $\pu{0.1 M}$ solution of $\ce{NH4HS}$, given $\mathrm{p}K_\mathrm{b}$ of $\ce{NH3}$ is $4.74$, and $\mathrm{p}K_\mathrm{a1}$ and $\...
- 1,411
-3
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1
answer
537
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How to calculate Kp without knowing the volume? [closed]
I have the following chemical equation:
$$\ce{Sb2S3 + 3H2 <=> 2 Sb + 3H2S}$$
I have $\pu{1000 grams}$ of $\ce{Sb2S3}$ that reacts with $\pu{10 grams}$ of $\ce{H2}$ in a reactor at $\pu{713 K}$.
...
5
votes
1
answer
2k
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Does pressure affect pH? [closed]
Since pH is the function of $\ce{H+}$ ion concentration, the change in volume will change the equilibrium according to Le Chatelier's principle and affect the pH. Is it correct, or are there any ...
- 73
-1
votes
1
answer
199
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How are acids in aqueous solution able to react again after reacting with water?
I hope to clear up some confusion I have about acid-base reactions in aqueous solution.
Based on the Bronsted-Lowry definition of acids, I know acids donate protons. In water, a strong acid should ...
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151
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pH for an HA/NaA solution using a contour map
The following question has troubled me for a while now.
A virtual weak acid $\ce{HA}$ dissociates as follows:
$\ce{HA <=> H^+ + A^-}$
with the acid dissociation constant $K_\mathrm{a} = 10^{-3....
- 605
-1
votes
1
answer
1k
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Equilibrium constant expression for an acid base reaction
While reading an organic chemistry textbook I saw the following Formula for calculating equilibrium constant of an acid-base reaction
Consider following acid base reaction in which $\ce{HA}$(reactant ...
- 194
2
votes
2
answers
427
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Why is degree of dissociation used to estimate strength of an acid?
Problem
Which of the following will give strength of acid?
A) pH
B) Normality
C) Degree of dissociation
D) Dissociation constant
Answer
Question
If pH is not considered as a metric to assess the ...
- 1,409
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2
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787
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Calculating the pH of a 'buffer' solution?
Question: Determine the $\mathrm{pH}$ of the solution resulting when $\pu{100 cm^3}$ of $\pu{0.50 mol dm-3}$ $\ce{CH2ClCOOH}$ is mixed with $\pu{200 cm^3}$ of $\pu{0.10 mol dm-3}$ $\ce{NaOH}$.
The ...
- 153
-1
votes
1
answer
161
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Finding a Mistake Calculating the pH of Ammonium Acetate
I'm trying to calculate the $\mathrm{pH}$ of a $\pu{0.10 M}$ solution of ammonium acetate, and I am struggling to find what mistake I am making within the following calculations:
We know that $\dfrac{[...
- 102
-1
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2
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302
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What happened to the Na+ ion? [closed]
I was in the middle of my acid and base schools questions when I came to a stop at this question. I have posted the answer to tell you what I am confused about. My teacher did not explain this very ...
- 59
0
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2
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344
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Neutralisation of weak acid by base
I'm still working on my concepts related to chemical equilibrium. I came across this question:
10mL of a weak acid HA is 20%
dissociated in water. This solution is completely neutralised by 10 mL
of $...
- 149
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2
answers
2k
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How to know if a reaction forms H3O+ ions or OH- ions? [closed]
How would you know when an acid or base is paired with $\ce{H2O}$ that it will form an $\ce{OH-}$ ion or a $\ce{H3O+}$ ion? I just started the acid and base equilibrium unit, and I'm just confused on ...
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