Question

unidades de concentración ayudaa

Answer 1

m alcohol = 250 g
m yodo = 2 g
a)  % m/m = m soluto   x  100                    `````````````                      m solc.
preparar la m solución = masa soluto + masa solvente
m solc. = 2 g + 250 g = 252 g
%m/m = 2 g  x  100             ``````             252 g
% m/m = 0.79 %
b) m yodo sólido = 0.5 g
m solución =  0.5 g   x   100                     ``````````                     0.79 g/g
m solución = 63.29 g
c) m solución = 50 g
m soluto = 0.79 g/g  x  50 g                 `````````````````````````                           100
m soluto = 0.395 g de yodo