Question

РЕБЯТА ПОМОГИТЕ СРОЧНО!!Вычислить массовую соли в растворе, полученном добавлением 20г соли к 150 граммам растворам с массовой долей растворенного вещества 10%

Answer 1

M p-pa 1 = 150 г
W 1 = 10% (0,1)
m соли = 20 г

W 2 -?

m соли в начальном растворе = m p-pa 1 x W 1 = 150 x 0,1 = 15 г
m соли в конечном растворе = 15 + 20 = 35 г
m p-pa 2 = m p-pa 1 + m добавленной соли = 150 + 20 = 170 г
W 2 = m соли в конечном растворе / m p-pa 2 = 35 / 170 = 0,206 (20,6 %)

Answer 2

Calculation of Mass of Salt in Solution

To calculate the mass of salt in the solution, we need to consider the mass of the added salt and the mass of the solvent.

Given: - Mass of salt added = 20 grams - Mass of solution = 150 grams - Mass fraction of dissolved substance = 10%

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

Mass of salt in solution = Mass of salt added × (Mass fraction of dissolved substance / 100)

Substituting the given values into the formula:

Mass of salt in solution = 20 grams × (10 / 100) = 2 grams

Therefore, the mass of salt in the solution obtained by adding 20 grams of salt to 150 grams of solution with a mass fraction of dissolved substance of 10% is 2 grams.