New answers tagged redox
3
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Role of MnSO4 in permanganometric titration
Both the oxidating ion $\ce{MnO4-}$ and reducing ion $\ce{C2O4^2-}$ are anions and therefore electrostatically repulsing each other, what makes their reaction slow.
$\ce{Mn^2+}$ ions serve as catalyst,...
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-1
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What is brown/red precipitate in battery acid
You did something responsible with the acid (which is usually around 35% if memory serves) such as neutralize it to pH 7, right?
The best (and cheapest) way to neutralize sulfuric acid is with ash ...
2
votes
What is brown/red precipitate in battery acid
Lead oxides have various colors.
$\ce{PbO}$ is red or yellow.
$\ce{Pb3O4}$ is orange or red.
$\ce{PbO2}$ is brown or black.
Likely you have a mix of all of them.
BTW, this is not the safest ...
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1
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Why does the reaction "pause" when the battery is not connected to a circuit? (or does it?)
In a battery, the zinc and manganese reagents are kept separate, and so the electrons can only flow when both parts of the battery are connected via an electric circuit.
If you take a look at the ...
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1
vote
Accepted
Why does the reaction "pause" when the battery is not connected to a circuit? (or does it?)
If no wire is joining the zinc plate and the $\ce{MnO2}$ plate, the whole setup would not be a cell or a battery. It wouldn't produce any anode or any cathode. The whole setup would simply be a ...
- 27.1k
2
votes
What is meant by 'as Cl2'
Let imagine there are 3 bank accounts, one with 10000 Euros, one with 10000 US dollars, one with 10000 UK pounds. Let assume - just illustratively - there is exchange ratio 5 dollars per 4 Euros and ...
- 39.4k
0
votes
How do I explain that voltage decreases when increasing the concentration of the cathode in a voltaic cell?
Nernst eqn says that,
$$E_c=E^o_c-\frac{0.059}{n}logQ_c$$.
Now $Q_c = \frac{products}{reactants}$
If I take the cell reaction $\ce{Zn + Cu^2+ -> Zn^2+ + Cu}$,
$Q_c=\frac{[\ce{Zn^2+}](anode)}{[\ce{...
5
votes
What is meant by 'as Cl2'
In general, sentences like "The concentration of X as Y is z mg/L" should be interpreted to mean "If you extract all the X from 1 L of solution, then convert the X completely to Y (...
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1
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is alkyl halide turning into alkene reduction or oxidation?
HI is being removed in the reaction. It is $\beta$-elimination. I really am not able to see any changes in the oxidation numbers also.
$\ce{CH3-CH(I)-CH2-CH3}$ will undergo dehydrohalogenation.
Only ...
1
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Acid dissociation constant from conductometric data
This answer is more about the chemistry and how the conductivity relates to the ions present, and does not show a numerical solution. For that, check the answer by Poutin.
Here is the acid/base ...
- 39.1k
2
votes
Accepted
Acid dissociation constant from conductometric data
The molar conductivity $\Lambda_\ce{AHCl hydr}=\pu{119.4 S cm2 mol−1}$ is equivalent to the partially hydrolyzed hydrolyzed anilinium chloride, according to the hydrolysis constant.
$$\ce{PhNH3+(aq) + ...
- 39.4k
0
votes
Find cell configuration notation for permanganate in acidic medium
Because I heard people saying that since the anode already has a solid substance (solid iodine) it's not necessary to add platinum to the anode. I digress because I think platinum is necessary for the ...
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5
votes
Accepted
Which of the following might turn NaNO2 into N2?
To get N2 from NaNO2, NaNO2 must be reduced right, So we need a reducing agent which oxidizes itself and would reduce NaNO2
Now look at the options
Let's see HNO3, the oxidation state of Nitrogen is ...
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