Question

Какая масса метилацетата образуется при взаимодействии 80 г 60% раствора уксусной кислоты с метиловым спиртом ,если доля выхода эфира составляет 90% ?

Answer 1

Прикрепила..............................

Answer 2

Calculating the Mass of Methyl Acetate

To calculate the mass of methyl acetate formed when 80g of a 60% solution of acetic acid reacts with methyl alcohol, we can use the concept of the yield of the reaction. Given that the yield of the reaction is 90%, we can proceed with the calculation.

First, we need to determine the amount of acetic acid in the 80g solution. Then, we can use the balanced chemical equation for the reaction between acetic acid and methyl alcohol to find the theoretical yield of methyl acetate.

The balanced chemical equation for the reaction is: CH3COOH + CH3OH → CH3COOCH3 + H2O

Now, let's proceed with the calculation.

Calculation Steps

1. Calculate the amount of acetic acid in the 80g solution: - The 60% solution of acetic acid means that 60% of the solution is acetic acid. - Therefore, the amount of acetic acid in the solution is 80g * 0.6 = 48g.

2. Use the balanced chemical equation to find the theoretical yield of methyl acetate: - The molar mass of acetic acid (CH3COOH) is approximately 60.05 g/mol. - The molar mass of methyl alcohol (CH3OH) is approximately 32.04 g/mol. - The molar mass of methyl acetate (CH3COOCH3) is approximately 74.08 g/mol. - Using the molar masses, we can calculate the theoretical yield of methyl acetate.

3. Calculate the theoretical yield of methyl acetate: - The molar ratio of acetic acid to methyl acetate in the balanced chemical equation is 1:1. - Therefore, the theoretical yield of methyl acetate is the same as the amount of acetic acid used in the reaction, which is 48g.

4. Apply the yield percentage to find the actual yield of methyl acetate: - Given that the yield of the reaction is 90%, we can calculate the actual yield of methyl acetate as 48g * 0.90 = 43.2g.

Conclusion

The mass of methyl acetate formed when 80g of a 60% solution of acetic acid reacts with methyl alcohol, with a yield of 90%, is approximately 43.2 grams.