Question

Срочно ответить: Яка масова частка розчиненої речовини в розчині, виготовленому в результаті розчинення солі массою 10Г у воді массою 390Г???Пояснити чому???

Answer 1

Маса розчину складається з маси розчиненої речовини та маси води
m(розчину) = m(солі) + m(H2O) = 10 г + 390 г = 400 г
Масова частка розчиненої речовини - це відношення маси розчиненої речовини до маси розчину:
ω=m(p.p.)/m(pозч.) = 10 г/400 г = 0,025 або 2,5%
Відповідь: 2,5%

Answer 2

Mass Fraction of the Solute in the Solution

The mass fraction of the solute in a solution can be calculated using the formula:

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

In this case, the mass of the solute (salt) is 10g, and the total mass of the solution is 390g.

Calculation

Using the formula, we can calculate the mass fraction of the solute in the solution:

Mass Fraction = (10g / 390g) x 100%

Mass Fraction ≈ 2.56%

So, the mass fraction of the solute (salt) in the solution, prepared by dissolving 10g of salt in 390g of water, is approximately 2.56%.

Explanation

When a solute is dissolved in a solvent to form a solution, the mass fraction of the solute represents the ratio of the mass of the solute to the total mass of the solution. In this case, the mass fraction of the solute is 2.56%, indicating that the salt makes up approximately 2.56% of the total mass of the solution.

This calculation is important in various fields, including chemistry and industry, as it helps in understanding the concentration of the solute in the solution and its impact on the properties of the solution.

If you have further questions or need additional information, feel free to ask!