All Questions
16
questions
0
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1
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400
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Relation between Solubility Product and Equilibrium Constant
I had read about Solubility, and I found that Solubility is not Molarity (because previously I believe that both are same thing). But, they have a big difference (source : https://en.wikipedia.org/...
-1
votes
1
answer
94
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What is the correct way to write dissociation reactions? [closed]
The variants are as follows:
For a salt (NaCl):
$$\ce{NaCl_{(s)}<=>NaCl_{(aq)}<=>Na_{(aq)}^{+} + Cl_{(aq)}^{-}}\tag{1}$$
$$\ce{NaCl_{(s)}<=>Na_{(aq)}^{+} + Cl_{(aq)}^{-}}\tag{2}$$
$$\...
user65517
1
vote
1
answer
127
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Finding solubility of salts of polyprotic acids
Problem
Given, for $\ce{H3PO4}$,
$\mathrm{pK_\mathrm{a_1}=2.2}$
$\mathrm{pK_\mathrm{a_2}=7.2}$
$\mathrm{pK_\mathrm{a_3}=12.4}$
For the salt $\ce{Mg(NH4)PO4}$, $\mathrm{pK_\mathrm{sp}=12.6}$ and the ...
- 1,817
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 ...
-3
votes
1
answer
89
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solubility and solubility product
I am a high school student and I am a little confused in solubility product.
My confusion is that when we talk of solubility of salts we say that suppose if any salt have solubility $s$ it means that ...
- 252
-1
votes
1
answer
216
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Find minimum solubilty of AgCN [closed]
i know it has to be solved by writing an equation between CN- conc and solubilty but i am unable to write a non-linear equation,any help is appreciated
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
votes
1
answer
43
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Is there a name, or any specific jargon for a precipitation equilibrium involving a solid reactant?
Let's say you have some ions in solution, for example Na+(aq) and OH-(aq), and some partially dissolved solid, MgCO3(s), Mg+2(aq) and CO3-2(aq), which precipitates Mg(OH)2(s) until equilibrium.
So ...
1
vote
0
answers
39
views
Saturation dissolved oxygen level at pressure
The saturation level of dissolved oxygen in contact with a moist atmosphere is
$$c = 0.21(p_\mathrm{atm} - p_\mathrm{vap}) K_\mathrm{H} M$$
where the $p_\mathrm{atm}$ and $p_\mathrm{vap}$ are the ...
- 151
1
vote
1
answer
170
views
Should I include ions from the solvent in solubility product constant calculations?
I'm trying to determine the Solubility Constant $K_\mathrm{sp}$ of $\ce{Ba(NO3)2}$ dissolved in nitric acid solution $\ce{HNO3}$ from experimental data.
$\ce{HNO3}$ will be mostly dissociated so ...
- 199
5
votes
2
answers
4k
views
How is silver chloride more soluble in brine than water?
I heard that:
Silver chloride is more soluble in very concentrated NaCl solution (brine) than in pure water.
Is it true? I mean, won't the common ion effect operate? Or is this maybe due to some ...
user66257
7
votes
2
answers
19k
views
Why is EDTA most soluble at a pH 8? (addition of NaOH)
Although Wikipedia says that EDTA is a very soluble salt, preparing a solution (.5M) is a pain in the neck. It takes a lot of time and still doesn't dissolve. Although addition of a few drops of NaOH ...
- 422
1
vote
1
answer
772
views
Understanding effect of ph on solubility of salt
In the following picture why Ksp is not simply S2- ? Why is f included with one species only? Please explain the last part.
What does f represent and why it is used in molar solubility?
user24679
1
vote
1
answer
938
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Determining solubility of silver sulfate in its saturated solution
Question:
Calculate the molar sulfate concentration in a solution that is $0.200$ M in $\ce{Ag+}$ and saturated with $\ce{Ag2SO4}$.
My attempt:
Looking through old notes and googling lead me to ...
- 229
2
votes
1
answer
4k
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Why the "Diverse Ion Effect" increases Ksp?
I've read in chemwiki about the diverse ion effect. Assuming I have an aqueous solution of $\ce{NaCl}$ and an associated $K_\mathrm{sp}$. If I add $\ce{KI}$ there is an associated $K_\mathrm{sp}'$ for ...
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