Question

В воде обьёмом 300 мл растворили хлороводород обьёмом 112 л (н.у.) Какая массовая доля HCl в добытой кислоте?

Answer 1

Количество молей (соляной кислоты)=объём/молярный объём=11,2/22,4=0,5 моль
Масса соляной кислоты=количество моль*молекулярную массу=0,5*36,5=18,25 г
Масса воды=объём*плотность=1000г*1г/мл=1000 г
Общая масса раствора=масса воды+масса соляной кислоты=18,25+1000=1018,25 г
1018,25 г-100%
18,25 г-х %
х=18,25*100/1018,25=1,79%

Answer 2

Calculating the Mass Fraction of HCl in the Solution

To calculate the mass fraction of HCl in the solution, we can use the following formula:

Mass fraction = (mass of solute / total mass of solution) × 100%

Given: - Volume of water = 300 ml - Volume of HCl solution = 112 L (at standard conditions)

First, we need to convert the volume of HCl solution from liters to milliliters: 112 L = 112,000 ml

Now, we can calculate the mass fraction of HCl in the solution using the given volumes.

Calculation

The mass fraction of HCl can be calculated as follows:

Mass of HCl = (Volume of HCl solution) × (Density of HCl)

The density of HCl at standard conditions is approximately 1.19 g/ml.

Mass fraction = (mass of HCl / total mass of solution) × 100%

Solution

Using the given information and the calculated mass of HCl, we can determine the mass fraction of HCl in the solution.