Question

.У воді об'ємом 400 мл розчинили сіль масою 80 грам. Визначте відсоткову концентрацію солі в розчині

Answer 1

Так как плотность воды равна 1 г/мл, то 400 мл воды  имеют массу 400 г.

Масса раствора равна:

m(p-p) = m(в-во) + m(Н₂О) = 80 + 400 = 480 г

Массовая доля вещества в растворе:

ω = [m(в-во)/m(p-p)] * 100 = (80/480)*100 = 16,67%

Answer 2

Calculating the Percentage Concentration of Salt in the Solution

To calculate the percentage concentration of salt in the solution, we can use the formula:

Percentage Concentration = (Mass of Salt / Volume of Solution) x 100%

Given: - Volume of solution (V) = 400 ml - Mass of salt (m) = 80 grams

Using the formula, we can calculate the percentage concentration of salt in the solution.

Percentage Concentration = (80 g / 400 ml) x 100%

Percentage Concentration = (0.2 g/ml) x 100%

Percentage Concentration = 20%

Therefore, the percentage concentration of salt in the solution is 20%.