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Se oxideaza steochiometric 3 moli de acetilena cu o solutie apoasa de permanganat de potasiu , conform reactiei :

c2h2 + 4[o]----------> cooh-cooh

Cate % (procente molare) din hidroxidul de potasiu rezultat pot reactiona cu produsul organic aparut in reactie?

ps: Puteti sa-mi explicati problema in amanunt ?! :(
Multumesc anticipat!

raspunsuri: a.10 ;b.75 ; c.25 ; d.90; e.50;


Răspuns :

Scriem cele doua reactii:
1mol.....4moli...1mol
C2H2 + 4[O] -> HOOC-COOH
3moli....12moli..3moli
...............................2moli...................3moli
2KMnO4 + H2O -> 2KOH + 2MnO2 + 3[O]
...............................x=8moli.............12moli
1mol..................2moli
HOOC-COOH + 2KOH -> KOOC-COOK + 2H2O
3moli.................6moli
%trans=6*100/8=75%