All Questions
Tagged with aqueous-solution ions
82
questions
2
votes
2
answers
316
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My textbook writes hydronium ion as [H(H2O)]+, is this correct? [closed]
[...] Thus, it bonds to the oxygen atom of a solvent water
molecule to give trigonal pyramidal hydronium ion, $\ce{H3O^+}$ $\ce{\{[H (H2O)]^+\}}$ (see box).
In this chapter we shall use $\ce{H^+(aq)}$ ...
- 127
1
vote
2
answers
456
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What is the hydrated diameter of a lithium ion？
When salts dissolve in water, the anions, cations, and strongly polar water molecules undergo hydration reactions, resulting in the formation of hydrated ions with a specific number of coordinated ...
- 31
-1
votes
1
answer
66
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Soluble Ion separation [closed]
Is it possible to separate ions dissolved in solution? I know that the charges have to be balanced, so thinking that maybe it is possible to artificially give that charge? Take for example, sodium ...
- 17
-1
votes
1
answer
257
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Is lead iodide a strong electrolyte?
So, lead iodide is insoluble. I see conflicting answers online. Some say it's a weak electrolyte because it is insoluble, others say it is a strong electrolyte because it is an ionic compound and any ...
- 21
4
votes
1
answer
224
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Do ion-exchange membranes *always* require ions to pass in both directions?
In an answer to this question, it was asserted that:
Student always tend to forget that a solution must remain electrically neutral by all means. If you want a certain ion to leave water, you must ...
- 189
7
votes
1
answer
1k
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Is there a material that ions can pass through but water can’t?
I was wondering whether there is a material that can pass ions (such as the ions existing in seawater) but not water. I am aware that water molecules are smaller, so they can pass through some ...
- 223
-1
votes
1
answer
1k
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Why does acetate ion react with water? [closed]
When NaCl is added to water, it dissociates into $\rm{Na^+}$ and $\rm{Cl^-}$. The newly formed $\rm{Na^+}$ and $\rm{Cl^-}$ do not react with water.
When $\rm{CH_3COONa}$ (sodium acetate) is added to ...
- 171
1
vote
1
answer
99
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Basic behavior of ammonia in aqueous medium [closed]
Thanks to the reversible reaction
$$\ce{NH3 + H2O <=> NH4+ + OH-},\tag{R1}$$
we know that ammonia acts as a weak base. However, I was wondering why it ends up forming ammonium $\ce{NH4+}$ and ...
- 121
0
votes
0
answers
109
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Comparative Solubility of Double Salts
Is there a tendency that could be used to generally forecast how a double salt might dissolve in aqueous medium compared to the simple salts of its constituents?
Example:
There is metal A, metal B and ...
- 1,097
-3
votes
1
answer
111
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Behavior of ionic salts in solution
The electrons of an isolated sodium chloride bound pair in vacuum reside at a semi-classical level in their ground state, so that the Born-Oppenheimer approximation applies, and the 'molecule' acts ...
- 143
1
vote
3
answers
314
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How to decrease the percent of ammonia that is converted to the ammonium ion in water? [closed]
Ammonia is a weak base that reacts with water according to this equation:
NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH −(aq)
Will Fe(NO3)3 decrease the ...
- 129
-7
votes
1
answer
4k
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Is Phosphate (PO4 3-) solube in water? [closed]
Josh~
Superphosphate is used instead of just phosphate because superphosphate is a compound whereas phosphate is an ion. This means that phosphate must attach itself with a cation in order to give a ...
0
votes
1
answer
577
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What happens if you put a piece of copper into a solution containing Al3+ ions?
This is a question in my studies, and I am a little bit confused! I would think it happens nothing because copper is below aluminium in the reactivity series, right?
- 103
1
vote
1
answer
172
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Which ions determine ionic conductivity of a salt solution?
Let's take $\ce{ZnSO4}$ salt solution in water for example. So the ions inside my solution will be $\ce{H+}$, $\ce{OH-}$, $\ce{Zn^2+}$ and $\ce{SO4^2-}$.
My questions are:
Is the ionic conductivity ...
- 59
1
vote
0
answers
47
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how can I predict the rate of water ions precipitation on a surface?
Consider a titanium pot that contains 1kg water with the following ions:
$[Ca^{2+}]=22000$ ppm, $[Mg^{2+}]=1500$ ppm,$[Sr^{2+}]=791$ ppm,$[Na^{1+}]=48000$ ppm,$[Cl^{1-}]=120000$ ppm,$[SO_4^{2-}]=...
- 17
-1
votes
1
answer
53
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How can I get create complex metal ion solution such that the majority of the central metal ions only have one specific ligand?
I'm looking for a way to have the ligand, Chloride ion, datively bond with Copper Sulphate.
I understand it is as simple as creating a solution of Hydrochloric Acid and dissolving Copper Sulphate ...
- 217
0
votes
2
answers
299
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Why don't ions form crystal lattices in water and other polar solvents?
Ionic compounds are in the form of crystal lattices, and when they are dissolved in a polar solvent, they are bonded with the corresponding cations/anions of the polar solvent. For example, $Na^+$ ...
- 219
-1
votes
1
answer
386
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Can the ions of dissolved salts be physically separated with a strong enough external electric field?
Say you had a arbitrary amount of sodium chloride dissolved in water. Could an external electric field (e.g. the electrically charged plates in Millikan's oil drop experiment) physically pull apart ...
-1
votes
1
answer
97
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How does the water pollutant sodium nitrate affect the concentrations of other ions in tap (dam) water? [closed]
Context
In my assignment I've been given two water samples from the hinze dam. The first sample has been untouched, however the second has been contaminated with an unknown ionic compound. To ...
- 1
1
vote
1
answer
2k
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Do we consider the dissociation of water when dealing with ion concentrations of a solution?
One mole of hydrated copper(II) sulfate, $\ce{CuSO4 . 5 H2O},$ is dissolved in water. How many moles of ions does the solution contain?
1) 1
2) 2
3) 6
4) 7
The correct answer is 2. Specifically, I'm ...
- 39
0
votes
1
answer
1k
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How to determine which ions will pair to form a compound in an aqueous solution?
Let us assume we have an aqueous solution with the ions $\ce{A+}$, $\ce{B+}$, $\ce{C-}$ and $\ce{D-}$. Which ions will form a bond and why? Will the compound formed be $\ce{AC}$ and $\ce{BD}$ or $\ce{...
- 11
0
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1
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72
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Calculating the change in pH upon diluting an acid
What volume of water is added to $\pu{400 ml}$ of $\ce{HCL}$ solution so that the pH of the solution increases by 1 unit
This is how far i went but the answer says $\pu{1000 ml }$ where am I wrong is ...
-4
votes
2
answers
4k
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Why does acetic acid (CH3COOH) conduct electricity the worst in comparison to HBr, HCOONa and NaNO3 [closed]
Which of the given substances (in an aqueous solution) conducts electricity the worst: $\ce{CH3COOH}$, $\ce{HBr}$, $\ce{HCOONa}$ and $\ce{NaNO3}$?
I've found this assingment included in the 2017 ...
1
vote
0
answers
32
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Acid/base separation in nanofiltration
How do semi-permiable membranes handle salts that can separate into an acid and a base based on the "rules" of the membrane?
For example, say I have a nanofiltration membrane that rejects ...
- 1,690
1
vote
1
answer
585
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Calculating weight of soluble salt in a solution
I got a solution which density is $\pu{1.035 g mL-1}$ and it contains soluble salt $\ce{Ba(NO3)2}$ at concentration of $\pu{0.250 M}$. The teacher is asking from me to "clear" the solution from the $\...
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-2
votes
1
answer
2k
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Why do the Ions Swap in double displacement?
I'm curious but in a double displacement reaction I know that the anions are swapped around and normally a precipitate is formed, but why do the ions swap? Has it got something to do with electrical ...
- 1
3
votes
0
answers
2k
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Non existence of B3+ in solution [closed]
I read that B3+ ions do not exist in aqueous solution, because hydration energy cannot compensate for the sum of first three ionisation energies.
This leads me to the following questions:
If boron (...
- 3,862
-2
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1
answer
3k
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Why does copper sulfate disassociate into Cu+2 and SO4-2 when dissolved in water?
I'm trying to understand why exactly copper sulfate disassociates into $\ce{Cu^{2+}}$ and $\ce{SO4^{2-}}$ ions? How is it calculated? I'm trying to find information but it seems as if it is treated as ...
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-2
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1
answer
67
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Peroxide without hydrogen [closed]
How come we always see hydrogen peroxide and never peroxide by itself. Is there such a thing as peroxide ? Does this exist in nature? Why is hydrogen always associated with it? Please note: First ...
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2
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4k
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Is it necessary to write state symbols in ionic equations and if so, why?
I understand that it is necessary to use state symbols in an equation with compounds shown, such as:
$$\ce{NaCl(aq) +AgNO3 (aq) -> NaNO3 (aq) +AgCl(s)}$$
But is it necessary to use state symbols ...
- 101