Question

Какую массу 20%-ного раствора уксусного альдегида можно получить гидратацией 89,6л ацетилена (н.у.)

Answer 1

C2h2+h2o=ch3coh. (89,6л/22,4л/моль)=4моль(это количество вещества с2h2 за уравнением). Количество вещества (с2h2)=количеству вещества(ch3coh). Mr(ch3coh)*4моль=32*4=128г- это масса чистого сh3coh. Чтобы получить 20% раствор: 128/х=0,2. Из этого х(масса 20% раствора)=640г.

Answer 2

Calculating the Mass of 20% Acetic Aldehyde Solution

To calculate the mass of a 20% acetic aldehyde solution obtained by hydrating 89.6 L of acetylene at standard conditions, we can use the following steps:

1. Determine the Molar Mass of Acetylene (C2H2): - The molar mass of acetylene (C2H2) is approximately 26.04 g/mol.

2. Calculate the Number of Moles of Acetylene: - Using the ideal gas law, we can calculate the number of moles of acetylene using the formula: ``` moles = (volume in liters) / 22.4 L/mol ``` Substituting the given volume: ``` moles = 89.6 L / 22.4 L/mol = 4 moles ```

3. Determine the Stoichiometry of the Hydration Reaction: - The hydration of acetylene to form acetic aldehyde involves the addition of water (H2O) to acetylene (C2H2) to produce acetic aldehyde (C2H4O) according to the following balanced chemical equation: ``` C2H2 + H2O → C2H4O ```

4. Calculate the Molar Mass of Acetic Aldehyde (C2H4O): - The molar mass of acetic aldehyde (C2H4O) is approximately 44.05 g/mol.

5. Determine the Theoretical Yield of Acetic Aldehyde: - Since the reaction is stoichiometric, the theoretical yield of acetic aldehyde can be calculated based on the number of moles of acetylene used and the stoichiometry of the reaction.

6. Calculate the Mass of the 20% Solution: - Finally, the mass of the 20% acetic aldehyde solution can be calculated based on the theoretical yield and the concentration of the solution.

Let's proceed with the calculations.