Question

La deshidratarea a 1.5 g de alcanol in prezenta H2SO4, s-au obtinut 0.56l de alchena. Determinati formula alcoolului.

Answer 1

-Calculez moli alchena CnH2nrezultati: n=V/22,4l/mol,   n=0,56l/22,4l/mol=0,025mol
-calculez moli alcool saturat care sunt deshidratati:
1mol............................1mol
CnH2n+2O -------> CnH2n+ H20
0,025mol......................0,025mol
-calculez masa molara a alcoolului:
 n=m/M--> M=m/n--> M=1,5g/0,025mol=60g/mol
12n+2n+2+16=60----.> n=       calculeaza  si afla