Question

При взаимодействии раствора фенола массой 400 г с избытком бромной воды получили бромпроизводное массой 134,4г. Рассчитайте массовую долю фенола в растворе.

Answer 1

      Ответ: 9,4% Ответ:9,4% Ответ:9,4%

Answer 2

Calculation of the Mass Fraction of Phenol in the Solution

To calculate the mass fraction of phenol in the solution, we need to use the given information about the mass of phenol and the mass of the bromo derivative obtained.

Given: - Mass of phenol (C6H6O) = 400 g - Mass of bromo derivative = 134.4 g

To find the mass fraction of phenol, we can use the following formula:

Mass fraction of phenol = (Mass of phenol / Total mass of solution) x 100

To calculate the total mass of the solution, we need to consider the mass of phenol and the mass of the bromo derivative:

Total mass of solution = Mass of phenol + Mass of bromo derivative

Let's substitute the given values into the formula and calculate the mass fraction of phenol:

Total mass of solution = 400 g + 134.4 g = 534.4 g

Mass fraction of phenol = (400 g / 534.4 g) x 100 = 74.9%

Therefore, the mass fraction of phenol in the solution is approximately 74.9%.