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Results tagged with oxides
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user 127435
1
vote
0
answers
64
views
What chemical species is really acting as oxidizer in hot concentrated sulfuric acid [duplicate]
In some japanese website it is written that hot conc sulfuric acid has greater oxidation power than that of normal temperature since it contains sulfur trioxide formed by decomposition of the sulfuric …
- 677
6
votes
1
answer
404
views
Is it appropriate to call an element an amphoteric substance?
In most of Japanese high-school textbook it is written that Al,Zn,Sn and Pb are amphoteric element(in Japanese 両性元素）because they react both with strong acid and base.
For example Al reacts like below. …
- 677
5
votes
1
answer
322
views
The difference between Zn and Al on acid and base reaction
Because it was written on my textbook that Zn and Al dissolves in acid and alkali, I tried.
When I put Al in NaOH solution it reacted immediately. But when I put Zn in the same concentration of NaOH s …
- 677