Question

К 47 гр 10% р-ра этиламония прилили 31,2 гр 20% раствор хлорида бария. Опред массовую долю в-в в полученном растворе

Answer 1

47*0.1=4.7

31.2*0.2=6.24

(4.7+6.24)/(47+31.2)=0,14

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Answer 2

Calculating the Mass Fraction of the Solution

To calculate the mass fraction of the resulting solution, we can use the following formula:

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

Given: - Mass of ethylammonium solution (C2H5NH3) = 47 g - Concentration of ethylammonium solution = 10% - Mass of barium chloride solution (BaCl2) = 31.2 g - Concentration of barium chloride solution = 20%

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

For the ethylammonium solution: Mass of ethylammonium (C2H5NH3) = 47 g x 10% = 4.7 g For the barium chloride solution: Mass of barium chloride (BaCl2) = 31.2 g x 20% = 6.24 g Next, we calculate the total mass of the resulting solution: Total mass of solution = Mass of ethylammonium solution + Mass of barium chloride solution = 47 g + 31.2 g = 78.2 g

Now, we can calculate the mass fraction of each component in the resulting solution.

For ethylammonium (C2H5NH3): Mass Fraction (w%) = (4.7 g / 78.2 g) x 100% = 6.01%

For barium chloride (BaCl2): Mass Fraction (w%) = (6.24 g / 78.2 g) x 100% = 7.99%

Therefore, the mass fraction of ethylammonium in the resulting solution is approximately 6.01%, and the mass fraction of barium chloride in the resulting solution is approximately 7.99%.