Question

Обчисліть обєм ацетилену(н.у) який можна одержати з 250г кальцій карбіду що містить 25% домішок якщо вихід ацетилену становить 80% від теоретично можливого

Answer 1

В приложении................................

Answer 2

Calculating the Volume of Acetylene Gas

To calculate the volume of acetylene gas (standard conditions) that can be obtained from 250g of calcium carbide containing 25% impurities, with an 80% yield of acetylene gas, we can follow these steps:

1. Calculate the mass of pure calcium carbide: - Mass of impure calcium carbide = 250g - Percentage of impurities = 25% - Mass of impurities = 250g * 25% = 62.5g - Mass of pure calcium carbide = 250g - 62.5g = 187.5g

2. Determine the molar mass of calcium carbide (CaC2): - The molar mass of calcium (Ca) = 40.08 g/mol - The molar mass of carbon (C) = 12.01 g/mol - The molar mass of calcium carbide (CaC2) = 40.08 g/mol + 2 * 12.01 g/mol = 64.10 g/mol

3. Calculate the number of moles of pure calcium carbide: - Number of moles = Mass / Molar mass - Number of moles of pure calcium carbide = 187.5g / 64.10 g/mol

4. Use stoichiometry to find the moles of acetylene produced: - The balanced chemical equation for the reaction is: ``` CaC2 + 2H2O → Ca(OH)2 + C2H2 ``` - According to the stoichiometry, 1 mole of calcium carbide produces 1 mole of acetylene.

5. Calculate the moles of acetylene produced: - Moles of acetylene = Moles of pure calcium carbide

6. Convert moles of acetylene to volume at standard conditions: - 1 mole of any gas at standard conditions occupies 22.4 liters.

7. Calculate the volume of acetylene gas: - Volume of acetylene gas = Moles of acetylene * 22.4 liters

Let's calculate the volume of acetylene gas using the given information.