Question

Un alcool monohidroxilic saturat contine 26,66%O2 reactioneaza cu 2,3g sodiu .Calculati masa solutiei obtinutebde concentratie 20% si volumul gazului degajat

Answer 1

alcool monohidroxilic saturat = CnH2n+1OH

100%...............................26,66% O2

14n+18.............................. 16

=> 26,66(14n+18) = 1600

=> n = 3 => C3H7OH

                      2,3 g .... md .................... V L

 C3H7OH  +  Na  =>  C3H7ONa  +  1/2H2

                      23 ............60 ................. 22,4/2

=> md = 60x2,3/23 = 6 g propanoxid de Na

c% = 20% , c% = mdx100/ms => ms = mdx100/c% = 6x100/20 = 300 g sol

=> V = 2,3x11,2/23 = 1,12 L H2