Question

К раствору массой 10 грамм с массовой долей хлороводорода 10% добавили раствор массой 4 грамм с массовой долей хлороводорода 25% определите массовую долю HCl в образовавшемся растворе.

Answer 1

M1(HCl)=10*0.1=1г
m2(HCl)=4*0.25=1г
10+4=14г
Масса вещества в полученном растворе равна 1+1=2
тогда w(HCl)=2/14*100=14.3%

Answer 2

Calculation of the Mass Fraction of HCl in the Solution

To determine the mass fraction of HCl in the resulting solution, we need to consider the masses and mass fractions of the two solutions that were mixed.

Given: - Mass of the first solution = 10 grams - Mass fraction of HCl in the first solution = 10% - Mass of the second solution = 4 grams - Mass fraction of HCl in the second solution = 25%

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

Mass Fraction of HCl = (Mass of HCl in the resulting solution) / (Total mass of the resulting solution)

Let's calculate the mass of HCl in each solution:

For the first solution: - Mass of HCl in the first solution = (10 grams) * (10%) = 1 gram

For the second solution: - Mass of HCl in the second solution = (4 grams) * (25%) = 1 gram

Now, let's calculate the total mass of the resulting solution: - Total mass of the resulting solution = Mass of the first solution + Mass of the second solution = 10 grams + 4 grams = 14 grams

Finally, we can calculate the mass fraction of HCl in the resulting solution: - Mass Fraction of HCl = (Mass of HCl in the resulting solution) / (Total mass of the resulting solution) = (1 gram + 1 gram) / 14 grams = 2 grams / 14 grams = 0.142857

Therefore, the mass fraction of HCl in the resulting solution is approximately 0.142857, or 14.29%.

Please note that the calculations provided are based on the given information and assumptions.