Question

Расчитайте массовую долю соли в растворе полученном добавлением 50г воды к 200г 10%-го раствора соли

Answer 1

Это оень просто! Смотри, ответ 5

Answer 2

Calculating the Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution obtained by adding 50g of water to 200g of a 10% salt solution, we can use the following formula:

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

First, let's calculate the mass of salt in the original 10% salt solution:

Mass of salt in the original solution = 10% of 200g

Mass of salt in the original solution = 10/100 * 200g

Mass of salt in the original solution = 20g

Now, let's calculate the total mass of the solution after adding 50g of water:

Total mass of the solution = Mass of salt + Mass of water

Total mass of the solution = 20g + 50g

Total mass of the solution = 70g

Now, we can calculate the mass fraction of salt in the solution:

Mass fraction of salt = (20g / 70g) * 100%

Mass fraction of salt = 28.57%

So, the mass fraction of salt in the solution obtained by adding 50g of water to 200g of a 10% salt solution is 28.57%.