Question

Из 150 г раствора с массовой долей бромида натрия 6% выпарили 10 г воды и добавили 5 г той же соли. Массовая доля соли в полученном растворе

Answer 1

Прости если не правельно на кажется 154

Answer 2

M(NaBr)1=150*0.06=9 г
m(р-ра)2=150-10+5=145 г
m(NaBr)2=9+5=14 г
w(NaBr)=14/145=0.966=9.66%

Answer 3

Calculation of the Mass Fraction of Sodium Bromide in the Solution

To calculate the mass fraction of sodium bromide in the solution, we need to consider the initial mass of the solution, the mass of water evaporated, and the mass of sodium bromide added.

Given: - Initial mass of the solution = 150 g - Mass fraction of sodium bromide in the solution = 6% - Mass of water evaporated = 10 g - Mass of sodium bromide added = 5 g

To find the mass fraction of sodium bromide in the final solution, we need to determine the final mass of the solution after the water is evaporated and the sodium bromide is added.

Calculation Steps:

1. Calculate the mass of sodium bromide in the initial solution: - Mass of sodium bromide = Mass fraction of sodium bromide * Initial mass of the solution - Mass of sodium bromide = 6% * 150 g

2. Calculate the final mass of the solution: - Final mass of the solution = Initial mass of the solution - Mass of water evaporated + Mass of sodium bromide added - Final mass of the solution = 150 g - 10 g + 5 g

3. Calculate the mass fraction of sodium bromide in the final solution: - Mass fraction of sodium bromide = Mass of sodium bromide / Final mass of the solution

Let's calculate the values:

1. Calculate the mass of sodium bromide in the initial solution: - Mass of sodium bromide = 6% * 150 g = 0.06 * 150 g = 9 g

2. Calculate the final mass of the solution: - Final mass of the solution = 150 g - 10 g + 5 g = 145 g

3. Calculate the mass fraction of sodium bromide in the final solution: - Mass fraction of sodium bromide = 9 g / 145 g

Therefore, the mass fraction of sodium bromide in the final solution is approximately 0.0621 or 6.21%.

Please note that the values provided in this response are calculated based on the given information.