Question

Помогите пж срочно Рассчитайте массу воды и массу соли, которые необходимо взять для приготовления 134 г раствора хлорида натрия NaCl с концентрацией 16%.

Answer 1

Понятие 16% раствор означает, что в 100 г раствора содержится 16 г растворенного вещества, поэтому можем составить пропорцию:

100 г р-ра -------------- 16 г в-ва

134 г р-ра -------------- Х г в-ва

Х = 134*16/100 = 21,44 г соли

Тогда воды нужно:

134 - 21,44 = 112,56 г воды

Answer 2

Calculating the Mass of Water and Salt for a 134g Solution of Sodium Chloride (NaCl) with 16% Concentration

To calculate the mass of water and salt needed to prepare a 134g solution of sodium chloride (NaCl) with a concentration of 16%, we can use the following steps:

1. Understand the Problem: - We need to find the mass of water and the mass of salt (NaCl) required to make a 134g solution with a 16% concentration of sodium chloride.

2. Calculate the Mass of Salt (NaCl): - The concentration of the solution is given as 16%. This means that 16% of the total mass of the solution is sodium chloride. - We can calculate the mass of salt using the formula: \[ \text{Mass of salt} = \text{Total mass of solution} \times \text{Percentage of salt} \] \[ \text{Mass of salt} = 134g \times 16\% = 134g \times 0.16 = 21.44g \]

3. Calculate the Mass of Water: - The mass of water can be found by subtracting the mass of salt from the total mass of the solution: \[ \text{Mass of water} = \text{Total mass of solution} - \text{Mass of salt} \] \[ \text{Mass of water} = 134g - 21.44g = 112.56g \]

Therefore, to prepare a 134g solution of sodium chloride (NaCl) with a concentration of 16%, you would need approximately 21.44g of salt and 112.56g of water.