All Questions
12
questions
1
vote
2
answers
454
views
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
257
views
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
views
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
views
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
vote
1
answer
99
views
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
-2
votes
1
answer
67
views
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 ...
- 435
0
votes
1
answer
2k
views
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
0
votes
1
answer
258
views
The stability of the cupric and cuprous ions [duplicate]
My teacher told me that $\ce{Cu^2+}$ is more stable than $\ce{Cu+}$ in solution, but why? I think $\ce{Cu+}$ is $\ce{[Ar] 3d^10 }$ ,$\ce{Cu^2+}$ is $\ce{[Ar] 3d^9}$, why is $\ce{Cu^2+}$ more stable ...
- 82
1
vote
1
answer
12k
views
What happens to iron(III) sulfate (ferric sulfate) in aqueous solution?
Iron(II) sulfate (ferrous sulfate) is a salt that, in an aqueous solution, dissolves and yields $\ce{Fe^{2+}(aq)}$ and $\ce{SO4^{2-}(aq)}$. It then decomposes to ferric sulfate shortly thereafter.
...
- 4,265
4
votes
1
answer
4k
views
How to remove nitrate from water sample?
Are there any simple methods to completely remove nitrate ions from few ml of impure water sample?
One method I am curious about is the following process:
Add one or more reagents to water in test ...
- 63
7
votes
1
answer
7k
views
Does iron(III) sulfate react with copper?
As my understanding, there should be an oxidation-reduction reaction:
$$
\ce{2 Fe^3+ + Cu → 2Fe^2+ + Cu^2+}
$$
However, I always see the process using $\ce{FeCl3}$ to etch copper, but I never ...
- 173
3
votes
1
answer
2k
views
Reasons behind the different colors of a solution containing Iodine
Q) Iodine dissolves in a variety of solvents, forming solutions that are
purple, brown or any intermediate shade. This property is due to:
Hydrolysis of iodine
Formation of crystalline adducts
Charge ...
- 301