All Questions
12
questions
0
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1
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160
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Amphoteric character of V2O5
In my NCERT textbook, in the chapter 'The d- and f-block elements', the last paragraph under oxides and oxoanions of metals goes like this:
$(...)$ $\ce{V2O5}$ is, however, amphoteric though mainly ...
- 828
3
votes
0
answers
85
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Is hydrochloric acid or sulfuric acid more corrosive to titanium?
Which acid is more corrosive to titanium at 20 to 30 °C and similar concentrations: hydrochloric acid $\ce{HCl}$ or sulfuric acid $\ce{H2SO4}$?
I found some info on AZoMaterials — Titanium - Corrosion ...
- 131
3
votes
1
answer
4k
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Why does green ferrous sulfate solution change color to yellow upon addition of hydrochloric acid?
I was demonstrating the formation of $\ce{Fe(OH)2}$ precipitate at school when the light green $\ce{FeSO4}$ I was using reacted with dil. $\ce{HCl}$ turned yellow. This only happened with dil. $\ce{...
- 143
1
vote
1
answer
2k
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Do copper, copper(II) oxide, copper(II) hydroxide, copper(II) carbonate react with diluted sulfuric acid?
Which of the following will react with dilute sulfuric acid: copper, copper(II) oxide, copper(II) hydroxide, copper(II) carbonate?
Metals react with acids to give salt and hydrogen. So, copper will ...
- 501
1
vote
1
answer
1k
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When disolving a iron pill for titration, why do I use sulfuric acid instead of nitric or hydrochloric acid?
In a titration to decide the iron content of a pill we dissolved the iron in sulfuric acid and then titrated it with cerium(IV) sulfate. But I just wondered what's wrong with using nitric and ...
- 23
-2
votes
1
answer
195
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Conditions for the reduction of dichromate by manganese(II) to chromium(III) [closed]
The unbalanced redox reaction
$$\ce{Mn^2+ + Cr2O7^2- -> Mn^3+ + Cr^3+}$$
occurs in what type of condition?
(a) Acidic
(b) Basic
(c) Neutral
(d) Indeterminable
-2
votes
1
answer
1k
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Can concentrated sulfuric acid oxidize iron(II) to iron(III)?
Can concentrated (18 M) $\ce{H2SO4}$ oxidize $\ce{Fe^2+}$ to $\ce{Fe^3+}?$ Or does it actually block the oxidation? I read in some forum somewhere that in order to prevent $\ce{Fe^2+}$ from being ...
- 11
4
votes
2
answers
2k
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Is Fe(OH)2 soluble in alkalis?
I have just started inorganic chemistry in school and I have just learnt about metal aqua ions and how they react in water. I learnt that $\ce{[Fe(H2O)6]^2+}$ reacts in water by losing a $\ce{H+}$ ...
- 95
0
votes
2
answers
556
views
How to balance this redox reaction taking place in a basic medium?
How to balance this reaction which is taking place in a basic medium?
$$\ce{Al + MnO4- -> MnO2 + Al(OH)4-}$$
My Attempt
Reduction half reaction:
$$
\begin{align}
\ce{4 H+ + MnO4- + 3 e- &-&...
- 37
4
votes
0
answers
3k
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Titanium in HF vs HCl
So we tried the reaction between Titanium metal with hydrochloric acid and hydrofluoric acid at a similar concentration. While boiling temperatures and constant heat over a long period of time are ...
- 4,322
10
votes
1
answer
25k
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How does aqua regia dissolve gold?
I recently learned that aqua regia can dissolve less reactive or noble metals like gold. Aqua regia is a mixture of $\ce{HCl}$ and $\ce{HNO3}$, but separately, neither of these acids dissolve gold.
...
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6
votes
1
answer
77k
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Why does copper react only with nitric acid? [duplicate]
When we are entering the chapter for acid and base, one of the reactions is about reacting metal with acid to form a salt and hydrogen gas. My teacher also informed us that a metal which is at a lower ...
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