All Questions
Tagged with aqueous-solution ions
82
questions
4
votes
0
answers
254
views
Why does viscosity decrease when divalent cations are dissolved into aqueous solutions of sodium carboxymethylcellulose?
Sodium Carboxymethylcellulose (CMC/NaCMC/Aqualon) is a common product used in many instances for its unique properties, especially its ability to make solutions viscous. It is well known that the ...
- 53
1
vote
1
answer
2k
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Calculate the molarity of Na+ ions in 20 mL of a .130 M solution of Na2Cr2O7?
The answer is $\pu{0.260 M}$, but I keep getting $\pu{0.0052 M}$ because I thought the right way to do it was by multiplying $\pu{0.130 M}$ by $\pu{0.02 L}$, then multiplying by $2$ moles of $\ce{Na+}$...
- 11
0
votes
1
answer
2k
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How can I separate sodium ions from brine or molten NaCl?
Is possible to separate sodium ions from an aqueous solution of NaCl? If so, how do I go about it?
- 109
10
votes
1
answer
10k
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How does the HCl-KCl Buffer work?
I have just been studying the $\ce{HCl}$-$\ce{KCl}$ 'buffer', but there are still quite a few things I am uncertain about. I would appreciate any help in clearing up some questions I have.
What I ...
- 445
-2
votes
2
answers
87
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What do we call ions without basic and acidic properties
According to Brønsted theory,
Acids are substances (molecules and ions) donating $\ce{H+}$
Bases are substances (molecules and ions) receiving $\ce{H+}$
I've been trying to find a complete Brønsted-...
- 383
4
votes
1
answer
789
views
Relationship between the water ionization constant and ionic strength
I read in a textbook that
the water ionization constant ($K_\mathrm{w}$) increases as the ionic strength of the solution increases
and it confused me. If the ionic strength increased, then the ...
- 137
1
vote
2
answers
424
views
Why do substances ionise in water to turn into charged species? Wouldn't they prefer to stay as uncharged molecules?
Wouldn't this be more stable if they stayed as neutral molecules?
I've learnt that they will seek to reach the ratio of $[A]^a[B]^b/[C]^c$ that matches the $\ce{Ka}$ or $\ce{Kb}$ value.
But I do ...
- 2,853
2
votes
0
answers
46
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Ionic emission spectrum contamination
Imagine that I am trying to identify the presence of ions from among the metals $\ce {Li,Na,K,Ca,Sr, Ba}$ in some solution through their emission spectrum.
By mistake the wire used to introduce ...
- 121
0
votes
1
answer
106
views
Any differences in metal ion emission spectra?
If I measure the emission spectra of potassium using the following solutions
1) $0.1~\mathrm{M}$ of $\ce{KNO3}$
2) $0.1~\mathrm{M}$ of $\ce{K2SO4}$
will I see any significant differences?
I think ...
- 119
5
votes
1
answer
749
views
Trichloride ion (c.f. triiodide ion)
While triiodide ion is commonly known, why is that trichloride ion (and its salts) almost unheard of? While it does exist according to literature, why is the stability of trichloride ion in aqueous ...
- 51
4
votes
1
answer
533
views
Counterions in adsorption of ions
When an ion is adsorbed from an aqueous solution onto a solid, what happens to its counterion? Obviously, the solution does not become charged - does this mean that it too is adsorbed?
(Example: $
\...
- 1,292
1
vote
1
answer
2k
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How to calculate ion concentrations for a precipitation from the solubility product constant? [closed]
The equilibrium constant for dissolving the insoluble substance gold (I) iodide, AuI (s), in aqueous
solution is 1.6 × 10^-23
at 25ºC. Write the equilibrium constant expression and calculate the ...
- 75
1
vote
1
answer
245
views
Why does the composition of Ocean Water list sodium and chloride separately?
This is the site I am using.
It is also found here, but this uses mg/L instead of percents.
It lists Sodium at 30.8%, and Chloride at 55.3%. How can this be? Shouldn't the two be listed as Sodium ...
2
votes
2
answers
11k
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Is H+ (in an aqueous solution) = H3O+? [duplicate]
I was learning about autoionization in science and my science teacher wrote $\ce{H3O+}$ as $\ce{H+}$ — now, my intuition would lead me to assume that:
$$\ce{H3O+} = \ce{H+}$$
But, $\ce{H+}$ is just ...
- 409
4
votes
1
answer
2k
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Can silver metal be used to electrochemically reduce copper?
I have a solution of copper(II) ions and several cations. I am trying to reduce the copper ions to copper metal with electricity. My Ideas was to use silver as the anode and a copper wire as the ...
- 521