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How do i solve this question:

For the following reaction in presence of conc.H2SO4 find the number of molecules of CH3CO2CH2CH3: CH3CO2H+CH

3CH2OH---->CH3CO2CH2CH3+H2O.

Thankyou.

Palak J , 15 Years ago
Grade 11
anser 1 Answers
Askiitians Tutor Team

To solve the question regarding the reaction between acetic acid (CH3CO2H) and ethanol (CH3CH2OH) in the presence of concentrated sulfuric acid (H2SO4), we need to analyze the reaction step-by-step. The reaction you provided is an example of an esterification process, where an acid reacts with an alcohol to form an ester and water. In this case, the product is ethyl acetate (CH3CO2CH2CH3).

Understanding the Reaction

The reaction can be represented as follows:

  • Reactants: Acetic acid (CH3CO2H) and Ethanol (CH3CH2OH)
  • Products: Ethyl acetate (CH3CO2CH2CH3) and Water (H2O)

Balanced Chemical Equation

First, let’s write the balanced equation for the reaction:

CH3CO2H + CH3CH2OH → CH3CO2CH2CH3 + H2O

This equation shows that one molecule of acetic acid reacts with one molecule of ethanol to produce one molecule of ethyl acetate and one molecule of water.

Determining the Number of Molecules

To find the number of molecules of ethyl acetate produced, we need to consider the stoichiometry of the reaction. The coefficients in the balanced equation indicate the ratio of reactants to products. In this case, the coefficients are all 1, meaning:

  • 1 mole of acetic acid produces 1 mole of ethyl acetate.
  • 1 mole of ethanol produces 1 mole of ethyl acetate.

Calculating Molecules

If you know the number of moles of acetic acid or ethanol you have, you can directly determine the number of moles of ethyl acetate produced. For example:

  • If you start with 1 mole of acetic acid, you will produce 1 mole of ethyl acetate.
  • Using Avogadro's number (approximately 6.022 x 10²³), you can convert moles to molecules. Therefore, 1 mole of ethyl acetate corresponds to 6.022 x 10²³ molecules.

Example Calculation

Let’s say you start with 0.5 moles of acetic acid:

  • From the balanced equation, 0.5 moles of acetic acid will yield 0.5 moles of ethyl acetate.
  • To find the number of molecules: 0.5 moles × 6.022 x 10²³ molecules/mole = 3.011 x 10²³ molecules of ethyl acetate.

Final Thoughts

In summary, the number of molecules of ethyl acetate produced in this reaction depends on the amount of acetic acid or ethanol you start with. By using the stoichiometry of the balanced equation and Avogadro's number, you can easily calculate the number of molecules formed. If you have specific quantities of reactants, feel free to share them, and we can work through the calculation together!

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