Question

У 200 мл води розчинили 40 г залізного купоросу. Обчисліть масову частку солі у приготованому розчині.

Answer 1

200мл води = 200 г

m(розчину) = 200 г + 40 г = 240г

w(FeSO4) = 40г ÷ 240г × 100% = 16.6%

маса купоросу 16.6%

Answer 2

Calculating the Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution, we can use the formula:

Mass Fraction = (Mass of Salt / Total Mass of Solution) x 100%

Given: - Mass of water = 200 g - Mass of iron(II) sulfate (salt) = 40 g

Using the given values, we can calculate the mass fraction of the salt in the solution.

Calculations: - Total mass of the solution = Mass of water + Mass of salt - Total mass of the solution = 200 g (water) + 40 g (salt) = 240 g

- Mass fraction of the salt in the solution: - Mass Fraction = (40 g / 240 g) x 100% - Mass Fraction = (1/6) x 100% - Mass Fraction = 16.67%

Therefore, the mass fraction of the salt in the prepared solution is 16.67%.