Question

En un vaso se han puesto 250 g de alcohol junto con 2 g de yodo, que se disuelven completamente. Calcular la concentración de la disolución en % en masa.

Answer 1

The translation of the question is

250 g of alcohol have been put in a glass together with 2 g of iodine, which dissolve completely. Calculate the concentration of the solution in% by mass?

Answer:

The %mass by mass of the given solution is 0.794%

Step-by-step explanation:

We are given

Mass of solute(Iodine) = 2g

Mass of the solvent (Alcohol) = 250g

Since the Iodine dissolves completely in Alcohol

Total mass of the solution = 250 + 2 = 252g

the formula of concentration of the solution in % by Mass is given by

%
`(w)/(W) = (Mass of the solute*100)/(Total mass of the solution)`

%w/W =
`(2*100)/(252)`

= 0.794%

Therefore the %mass by mass of the given solution is 0.794%