Question

Вычисли массовую долю (%) сульфата натрия в растворе, если известно, что в 280 г раствора содержится 50 г растворённого вещества.

Answer 1

Ответ:

17,857%

Объяснение:

mр-ра=280г

m(Na2SO4)=50г

ω(Na2SO4)-?

ω(Na2SO4)= m(Na2SO4)÷mр-ра = 50÷280 = 0,17857×100% = 17,857%

Answer 2

Calculating the Mass Percentage of Sodium Sulfate in the Solution

To calculate the mass percentage of sodium sulfate in the solution, we can use the following formula:

Mass Percentage = (Mass of solute / Mass of solution) × 100%

Given: - Mass of the solution (w) = 280 g - Mass of the dissolved substance (solute) = 50 g

Using the formula, we can calculate the mass percentage of sodium sulfate in the solution:

Mass Percentage = (50 g / 280 g) × 100%

Mass Percentage = (0.1786) × 100%

Mass Percentage ≈ 17.86%

So, the mass percentage of sodium sulfate in the solution is approximately 17.86%.