Question

Найти объём водорода, выделившегося при реакции с 200г 30%-ого раствора соляной кислоты с железом

Answer 1

2HCL + Fe = FeCl2 + H2
m(HCl) = 200г*0.3 = 60г
ню(HCl) = 60/36.5 = 1.64 моль
ню(H2) = 1/2 ню(HCl) = 0.82 моль
V(H2) = ню(H2)*Vмоляр = 0.82* 22.4 = 18.4л

Answer 2

Calculating the Volume of Hydrogen Gas Produced

To calculate the volume of hydrogen gas produced in the reaction with 200g of 30% hydrochloric acid solution and iron, we can use the concept of molar volume and the stoichiometry of the reaction.

The balanced chemical equation for the reaction between hydrochloric acid and iron is: 2 HCl + Fe -> FeCl2 + H2

From the balanced equation, we can see that 2 moles of hydrochloric acid react with 1 mole of iron to produce 1 mole of hydrogen gas.

Step 1: Calculate the Amount of HCl in the Solution

First, we need to calculate the amount of hydrochloric acid in the 200g of 30% hydrochloric acid solution.

The molar mass of HCl is approximately 36.46 g/mol. Using the given concentration (30%), we can calculate the amount of HCl in the solution.

The amount of HCl in the solution can be calculated using the formula: Amount of HCl = (Mass of solution) * (Concentration of HCl)

Substituting the given values: Amount of HCl = 200g * 0.30

Step 2: Convert Amount of HCl to Moles

Next, we convert the amount of HCl to moles using the molar mass of HCl.

Moles of HCl = (Amount of HCl) / (Molar mass of HCl)

Step 3: Calculate the Volume of Hydrogen Gas

Since 2 moles of HCl produce 1 mole of hydrogen gas, we can use the molar volume of a gas at standard temperature and pressure (STP) to calculate the volume of hydrogen gas produced.

The molar volume of a gas at STP is approximately 22.4 L/mol.

Volume of hydrogen gas = (Moles of HCl) / 2 * (Molar volume at STP)

Result

By following these steps, we can calculate the volume of hydrogen gas produced in the reaction with 200g of 30% hydrochloric acid solution and iron.