All Questions
Tagged with ionic-compounds equilibrium
15
questions
1
vote
1
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157
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Solubility of SrF2 in aqueous solution of NaF
This might be really simple question but I have no idea how to proceed to solve such kind of question.
The solubility product of $\ce{SrF2}$ in water is $\pu{8E-10}$. Calculate its solubility in 0.1M ...
- 23
5
votes
2
answers
3k
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Why does the dissolution of calcium hydroxide have a negative entropy?
We had an experiment on the dissolution of calcium hydroxide and we obtained the experimental entropy value $\pu{-203 J mol^-1 K^-1}$ with a percent error of $26.7\%.$ Doesn't dissolving a solid in a ...
2
votes
2
answers
87
views
Is ionisation an equilibrium process?
I read in a page that ionisation is an irreversible process. But, as equilibrium is always reversible would that mean equilibrium does not involve ionisation process.
And than dissociation is a ...
- 29
2
votes
0
answers
48
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A trick to find resultant pH [duplicate]
Consider the following problem:
Find the $\mathrm{pH}$ of the solution formed by the mixing of two solutions of $\mathrm{pH}$(s) $2$ and $3$ of equal volumes.
The normal way:
Since the resulting ...
- 397
1
vote
1
answer
265
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Why can’t I use solubility product for normally soluble compounds?
Solubility product only applies to sparing soluble ionic compounds (chemguide)
I read this in a website. But I don’t see what this should be the case. Taking $\ce{NaCl}$ for example, there’s an ...
- 69
2
votes
0
answers
36
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Why isn't the chemistry of a zinc-air battery (meaningfully) hindered by an activation energy barrier?
Virtually every source I've read pertaining to zinc-air batteries explain the chemistry of it either using these formulae or a simplified version of them:
$$
\begin{align}
&\text{Anode:} &\...
- 139
3
votes
4
answers
2k
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Calculation of Degree of Dissociation from Ostwald's Dilution Law
A "weak" electrolyte, $\ce{A+B-}$, ionizes in solution as:
$$\ce{AB <=> A+ + B-}\tag{1}$$
$$ K_d =\dfrac{\ce{[A+][B-]}}{\ce{[AB]}}=\dfrac{(\alpha c_{0})(\alpha c_{0})}{(1-\alpha )c_{0}}=\...
- 333
0
votes
1
answer
237
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Conditions for Complete hydrolysis of salt [closed]
My text book says that the cations (or anions) which are stronger than hydronium ion(or OH-) and their conjugate base (or acid) being very much weaker than water show complete hydrolysis.
While the ...
- 13
1
vote
1
answer
77
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Seeing solubility in various cases
Match the following:
$\begin{array}{|c|c|c|c|} \hline &\textrm{Column-I}&&\textrm{Column-II} \\\hline \textrm{(A)}&\ce{AgBr}&\mathrm{(p)}&\mathrm{(Solubility~in~water~is~more~...
- 111
0
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0
answers
29
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How to account for the common ion effect on osmolarity quantitatively?
In adjusting the osmolarity of a solution of Benzalknonium Cl, Disodium Editate, and Disodium borate/boric acid buffer to be isotonic (about 290 mOsm), the addition of NaCl showed unexpected behavior, ...
- 497
2
votes
2
answers
148
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Ionic equilibrium between multiple ions
This is a question from IIT-JEE 1993:
For the reaction
$$\ce{[Ag(CN)2]^- -> Ag^+ + 2CN^-}$$
the equilibrium constant at $\pu{298 K}$ is $\pu{4e-10}$. The silver ion concentration in a ...
1
vote
1
answer
4k
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How does Borax Solution act as a buffer? [closed]
What type of buffer is it? If it's a Weak Acid-Conjugate Base type of buffer, what is the weak acid and conjugate base?
-1
votes
1
answer
36
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Finding the error in attempting the equilibrium question through isotherm equations
Consider the partial decomposition of A as:
$$\ce{2A(g) <=> 2B(g) + C(g)}$$
At equilibrium $\pu{700 ml}$ of gaseous mixture contains $\pu{100 ml}$
of gas C at $\pu{10 atm}$ and $\pu{...
- 5,501
1
vote
0
answers
200
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Does the activity product decrease with increasing ionic strength?
I have a question regarding what happens to the solubility of $\ce{CaSO_4}$ or the rate that $\ce{CaSO_4}$ will dissolve when we add $\ce{NaCl}$ to the solution:
$\ce{CaSO_4}$ will dissolve into $\...
- 133
0
votes
2
answers
1k
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How to estimate the equilibrium constant of the reaction between NaF and HCl
Since $\ce{HCl}$ is more acidic than $\ce{HF}$, the left hand side of a reaction has a stronger acid than the right hand side.
Since $\ce{NaF}$ is more basic than $\ce{NaCl}$, the left hand side has ...
- 2,106