Question

O alchena cu masa 16,8g a interactionat complet cu o solutie ce contine 32,4g acid bromhidric .Determina formula de structura,denumirea si masa produsului obtinut

Answer 1

F.M alchena => CnH2n

CnH2n + HBr => CnH2n+1Br

n=m/M = 32,4/81 = 0,4 moli HBr

MHBr = 81g/mol

14ng alchena............1 mol HBr
16,8g ....................0,4 moli HBr

5,6n = 16,8 => n=3

F.M alchena => C3H6 -> propena

F.M compus rezultat => H3C-CH(Br)-CH3, 2-bromopropan

m compus rezultat = 0,4n*M = 0,4*123 = 49,2g