Question

Завдання 4 Щоб зварити макарони, мама закип'ятила 2 л води і всипала в неї 2 столові ложки кухонної солі. Визначте масову частку солі в отриманому розчині, якщо одна столова ложка містить 25 г солі.​

Answer 1

Ответ:
2,4%

,5Объяснение:
Дано
m(соль)-50г
m(H2O)-2000г
Найть
W(соль)
W(E) =m(елемента)/m(розчину)*100%
2000+50=2050
50/2050*100%=2,4%

Answer 2

To determine the mass fraction of salt in the solution, we need to calculate the mass of salt and the total mass of the solution.

Given that one tablespoon contains 25 g of salt, and the mother added 2 tablespoons of salt to the solution, the mass of salt in the solution is:

Mass of salt = 2 tablespoons * 25 g/tablespoon = 50 g

The mother added 2 liters of water to the solution. Since the density of water is approximately 1 g/mL, the mass of water in the solution is:

Mass of water = 2 liters * 1000 g/liter = 2000 g

The total mass of the solution is the sum of the mass of salt and the mass of water:

Total mass of solution = Mass of salt + Mass of water = 50 g + 2000 g = 2050 g

To calculate the mass fraction of salt in the solution, we divide the mass of salt by the total mass of the solution and multiply by 100:

Mass fraction of salt = (Mass of salt / Total mass of solution) * 100

Substituting the values we calculated:

Mass fraction of salt = (50 g / 2050 g) * 100 ≈ 2.44%

Therefore, the mass fraction of salt in the obtained solution is approximately 2.44%.