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3 votes

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,...
Poutnik's user avatar
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-1 votes

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 ...
letmepicyou's user avatar
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 ...
DrMoishe Pippik's user avatar
1 vote

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 ...
isolated matrix's user avatar
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 ...
Maurice's user avatar
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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 ...
Poutnik's user avatar
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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{...
Harikrishnan M's user avatar
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 (...
anon's user avatar
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1 vote

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 ...
Harikrishnan M's user avatar
1 vote

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 ...
Karsten's user avatar
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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) + ...
Poutnik's user avatar
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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 ...
Metal Storm's user avatar
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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 ...
Shashaank's user avatar
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