Question

Calculate the mass fraction and mole fraction of ethyl alcohol and `H_(2) O` in a solution containing `9.2 g` of alcohol in `18.0 g` of `H_(2) O`.

Answer 1

`X_(2) = (W_(2) // Mw_(2))/((W_(1))/(Mw_(1)) + (W_(2))/(Mw_(2)))`
`= (9.2 // 46)/((18)/(18) + (9.2)/(46)) = (0.2)/(1 + 02) = 0.166 ~~ 0.17`
Mass fraction `X_(2) = (W_(2))/(W_(1) + W_(2)) = (9.2)/(18 + 9.2)`
`= 0.338 = 0.34`