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Diacenco99
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Acidul acetic poate fi obtinut in 3 etape succesive,folosinf ca substanta initiala carbura de calciu.Care va fi masa acidului acetic obtinut,daca se iau 480g de carbura tehnica ce contine 20% impuritati.

Răspuns :

Alexbonheur
CaC2 + 2 H2O => Ca(OH)2 + C2H2
C2H2 + 2 H2O => [ CH3-CH(OH)2 ] => CH3-CHO + H2O
CH3-CHO + [O] => CH3-COOH
m CaC2 = 480 g
m impuritati = 20% => purutatea (p) = 100 - 20 = 80 %
p= mp/ mi x 100 => mp = mi x p / 100
mp= masa pura
mi= masa impura
mp= 480 x 80/100 = 384 g CaC2 pur
M CaC2 = 64.1 g/mol
M CH3-COOH = 60 g/mol
64 g/mol CaC2 ... 60 g/mol Acid acetic
384 g CaC2 ..........a g Acid acetic
a= 384 x 60 / 64=360 g acid acetic.

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