Question

Какой объем водорода образуется при взаимодействии 560мг железа содержащего 10% примесей, с необходимым количеством серной кислоты ? Каково это количество? Сколько молекул водорода при этом получится?

Answer 1

Сначала запишем уравнение реакции

Fe+H2SO4 = FeSo4 + H2 

Найдем кол-во вещ-ва Fe

v=0.56*0.1/56=0.1 моль

v(Fe)=v()=0.1

V(H2)=22.4*0.1=2.24 литра

Ответ: 2.24

Answer 2

Calculating the Volume of Hydrogen Produced

To calculate the volume of hydrogen produced when 560mg of iron reacts with the necessary amount of sulfuric acid, we can use the balanced chemical equation for the reaction between iron and sulfuric acid.

The balanced chemical equation for the reaction is: Fe + H2SO4 → FeSO4 + H2

From the equation, we can see that 1 mole of iron reacts with 1 mole of sulfuric acid to produce 1 mole of hydrogen gas.

Step 1: Calculate the Moles of Iron

First, we need to calculate the moles of iron using its molar mass and the given mass.

The molar mass of iron (Fe) is approximately 55.85 g/mol. Given mass of iron = 560 mg = 0.56 g

Moles of iron = Given mass / Molar mass Moles of iron = 0.56 g / 55.85 g/mol Moles of iron ≈ 0.01 moles

Step 2: Calculate the Moles of Hydrogen

Since the reaction is 1:1 between iron and hydrogen, the moles of hydrogen produced will be the same as the moles of iron.

Moles of hydrogen = Moles of iron Moles of hydrogen ≈ 0.01 moles

Step 3: Calculate the Volume of Hydrogen

Now, we can use the ideal gas law to calculate the volume of hydrogen produced.

The ideal gas law is given by the equation: PV = nRT Where: P = pressure V = volume n = number of moles R = ideal gas constant T = temperature

At standard temperature and pressure (STP), the conditions are: - Pressure (P) = 1 atm - Temperature (T) = 273.15 K - Gas constant (R) = 0.0821 L·atm/(K·mol)

Using the ideal gas law, we can calculate the volume of hydrogen: V = nRT/P V = (0.01 moles)(0.0821 L·atm/(K·mol))(273.15 K) / 1 atm V ≈ 0.224 L

So, the volume of hydrogen produced is approximately 0.224 liters.

Calculating the Number of Hydrogen Molecules Produced

To calculate the number of hydrogen molecules produced, we can use Avogadro's number, which is approximately 6.022 x 10^23 molecules per mole.

Step 4: Calculate the Number of Hydrogen Molecules

Number of hydrogen molecules = Moles of hydrogen * Avogadro's number Number of hydrogen molecules ≈ 0.01 moles * 6.022 x 10^23 molecules/mol Number of hydrogen molecules ≈ 6.022 x 10^21 molecules

So, the number of hydrogen molecules produced is approximately 6.022 x 10^21 molecules.