Question

Какой молекулярный объем оксида углерода израсходуется на реакции с 10 г гидроксида натрия содержащего 20 проц. примесей

Answer 1

CO2 + 2NaOH = Na2CO3 + H2O
1) рассчитаем массу массу гидроксида натрия без примесей:
m(NaOH) = 10 * 0.8 = 8 г
2) определим количество вещества гидроксида натрия:
M(NaOH) = 40 г/моль
n(NaOH) = 8/40 = 0.2 моль
3) по реакции видим, что количество вещества углекислого газа в 2 раза меньше, то есть:
n(CO2) = 0.2 : 2 = 0.1 моль
4) найдем объем углекислого газа
V(CO2) = 0.1 * 22.4 = 2.24 л

Answer 2

Calculating the Molecular Volume of Carbon Oxide

To calculate the molecular volume of carbon oxide used in the reaction, we need to consider the molar mass of the substances involved and use the concept of molar volume to find the volume of carbon oxide gas.

Step 1: Calculate the Molar Mass of Sodium Hydroxide (NaOH) The molar mass of NaOH is 40 g/mol (sodium: 23 g/mol, oxygen: 16 g/mol, hydrogen: 1 g/mol).

Step 2: Calculate the Number of Moles of Sodium Hydroxide Using the given mass of sodium hydroxide (10 g) and its molar mass, we can calculate the number of moles: Number of moles = Mass / Molar mass Number of moles = 10 g / 40 g/mol Number of moles = 0.25 moles

Step 3: Determine the Stoichiometry of the Reaction The balanced chemical equation for the reaction between sodium hydroxide and carbon oxide is required to determine the stoichiometry of the reaction.

Step 4: Calculate the Volume of Carbon Oxide Using the ideal gas law, we can calculate the volume of carbon oxide gas 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

Given that the reaction takes place at standard conditions (1 atm and 273.15 K), we can use the molar volume of an ideal gas at standard conditions, which is approximately 22.4 L/mol.

Step 5: Calculate the Molecular Volume of Carbon Oxide The molecular volume of carbon oxide can be calculated by dividing the volume of carbon oxide gas produced by the number of moles of carbon oxide involved in the reaction.

Conclusion

The molecular volume of carbon oxide used in the reaction with 10 g of sodium hydroxide containing 20% impurities can be calculated using the steps outlined above.