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This tag should be applied to questions concerning acid and base reactions. An acid is capable of donating a hydron/ proton (Brønsted acid) or capable of forming a covalent bond with an electron pair (Lewis acid). A base on the other hand is a chemical species/ molecular entity having an available pair of electrons capable of forming a covalent bond with a hydron/ proton (Brønsted base) or with the vacant orbital of some other species (Lewis base).

2 votes
0 answers
84 views

Is reaction between SiO2 and CaO is Lewis acid and base reaction?

In my textbook it is written that the slag forming reaction between silicate and calcium oxide is acid base reaction. But this reaction is not Arrhenius definition of acid base reaction because this h …
satoru kurita's user avatar
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 …
satoru kurita's user avatar
5 votes
1 answer
444 views

Effective pH range in water. What is the definition

https://openchemistryhelp.blogspot.com/2013/02/solvent-levelling.html I learned the concept of solvent theory and solvent leveling of acid and base,but couldn't understand what the graph below says I …
satoru kurita's user avatar
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. …
satoru kurita's user avatar
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 …
satoru kurita's user avatar
0 votes
0 answers
729 views

Reaction of lead with acetic acid and hydrogen peroxide solution

My textbook says lead reacts with acetic acid when there is enough oxygen to oxidize lead: $$\ce{2 Pb + O2 + 4 CH3COOH -> 2 Pb(CH3COO)2 + 2 H2O}$$ So, I added lead into mixed solution of acetic acid …
satoru kurita's user avatar
0 votes
0 answers
280 views

What do you think is happening to aluminium in salt water with rusted copper?

I put some aluminium foil and rusted copper(namely a Japanese 10 yen coin) in saturated NaCl solution. After some minutes tiny amount of small bubbles were observed on the surface of the foil. After s …
satoru kurita's user avatar