4
votes
Accepted
Is Potassium permanganate an oxidizing agent or is the Permanganate ion the oxidizing agent?
In the context of substances, $\ce{KMnO4}$ and not $\ce{MnO4-}$ is the oxidizing agent.
In the context of ions, $\ce{MnO4-}$ and not $\ce{KMnO4}$ is the oxidizing agent.
In the context of elements ...
- 27.1k
4
votes
Accepted
Should I write formula for oxalate or oxalic acid while balancing a redox reaction using the ion-electron method?
One should report the species which is the most important one in the given system. As oxalic acid has two $\mathrm{p}K_\mathrm{a}$ values ($1.23$, and $4.19$), it means that you should report the ...
- 20.5k
4
votes
Why copper(I) is unstable in aqueous medium?
Quite the contrary, copper(I) is actually relatively stable compared with most fourth-period transition metals in the +1 oxidation state. As discussed here, copper in the +1 oxidation state can be ...
- 38.1k
3
votes
Accepted
How is 1 mole hypochlorite ion equivalent to 1 mole chlorine gas?
You will find the "equivalency" relations in many classical volumetric or gravimetric analysis. Active chlorine and active oxygen are such representative terms; these terms are academically ...
- 31.7k
3
votes
How is 1 mole hypochlorite ion equivalent to 1 mole chlorine gas?
If we consider reaction $$\ce{ClO- + Cl- + 2 H+ -> H2O + Cl2},$$
there is 1:1 ratio, 1 $\ce{ClO-}$ is equivalent to 1 $\ce{Cl2}$.
The equivalence does not mean the atom counts must match, as they ...
- 27.1k
3
votes
Accepted
Why did my book write S2- if hydrogen sulfide isn't ionic?
It is indeed better to render (1) as
$\ce{H2S -> S +2H^+ + 2e^-}.$
Since you did not ask, I assume you know the permanganate reduction equation. When you combine this reduction with the correctly ...
- 38.1k
1
vote
What is the role of hydration enthalpy in oxidation?
In aqueous solutions, halogens are powerful oxidising agents (especially fluorine). Let us confine our discussion to fluorine and chlorine. Oxidising ability can be demonstrated using the enthalpy ...
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