Question

В 150 г воды растворили 20 г хлорида натрия. Вычислите массовую долю соли в растворе

Answer 1

Дано m(H2O)=150г m(NaCl)=20г Найти w(NaCl) Решение w(NaCl)= m(NaCl)\m(р-ра) w(NaCl)= 20\150+20=20:170=0.1176*100%=11,76% Ответ:11,76%

Answer 2

Calculation of Mass Fraction of Salt in Solution

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

Given: - Mass of water = 150 g - Mass of sodium chloride (salt) = 20 g

To find the mass fraction of salt, we can use the formula:

Mass Fraction of Salt = (Mass of Salt) / (Mass of Solution)

Let's calculate the mass fraction of salt step by step:

1. Calculate the total mass of the solution: - Mass of water + Mass of salt = 150 g + 20 g = 170 g

2. Calculate the mass fraction of salt: - Mass of salt / Mass of solution = 20 g / 170 g

Now, let's perform the calculations:

1. The total mass of the solution is 170 g. 2. The mass fraction of salt is calculated as follows:

Mass Fraction of Salt = (20 g) / (170 g) = 0.1176

Therefore, the mass fraction of salt in the solution is approximately 0.1176 or 11.76%.

Please note that the calculations are approximate due to rounding.