Question

Смешали 160г 19%-ного раствора и 150г 18%-ного раствора.рассчитайте массовую долю растворенного вещества в образовавшемся растворе.

Answer 1

В первом растворе содержится 30,4 гр вещества (160*0,19)
во втором растворе соответственно 27 гр вещества (150*0,18)
сливаем вещества становится 57,4 гр, а раствора 310, массовая доля раствора составит 57,4/310=18,52

Answer 2

Calculating the Mass Fraction of the Resulting Solution

To calculate the mass fraction of the resulting solution after mixing 160g of 19% solution and 150g of 18% solution, we can use the formula:

Mass Fraction = (mass of solute / total mass of solution) × 100%

First, we need to find the mass of the solute in each solution.

The mass of solute in the 19% solution: Mass of solute = 19% of 160g = 0.19 × 160g

The mass of solute in the 18% solution: Mass of solute = 18% of 150g = 0.18 × 150g

Now, we can find the total mass of the resulting solution: Total mass = 160g + 150g

Finally, we can calculate the mass fraction using the formula mentioned above.

Mass Fraction = (mass of solute / total mass of solution) × 100%

Let's perform the calculations:

Mass of solute in the 19% solution: 0.19 × 160g = 30.4g Mass of solute in the 18% solution: 0.18 × 150g = 27g Total mass of the resulting solution: 160g + 150g = 310g

Mass Fraction: = ((30.4g + 27g) / 310g) × 100% = (57.4g / 310g) × 100% ≈ 18.52%

So, the mass fraction of the solute in the resulting solution is approximately 18.52%.