Question

Prin descompunerea catalitica a 1,15 g de acid ogranic monocarboxilic se obtin 1,12 l amestec echimolecular de dioxid de carbon si hidrogen. Sa se determine formula moleculara a acidului

Answer 1

CxHyO2  ⇒ xCO2 + y/2 H2
n acid = 1,15/(12x + y+32)
x = y/2     y = 2x
nCO2 = x·n acid = 1,12/(2·22,4) = 0,025 moli
x·1,15/(14x+32) = 0,025     46x = 14x +32    32x = 32  x = 1
acid = HCOOH ⇒ CO2+ H2