Chemistry

A student did the Synthesis of Salicylic Acid experiment starting with 3.89 g of methyl salicylate (C8H8O3) and using 40 mL of 6.0 M NaOH. To evaluate her success she needs to determine the limiting reagent. The reaction goes as follows:
C8H8O3 + H2O ==> C7H6O3 + CH3OH.
Assuming the solution of NaOH is mostly water, she uses the volume of NaOH = volume of H2O. Also she assumes that the density of water is 1.000 g/mL. Which is the limiting reagent methyl salicylate or water?
How many moles of salicylic acid can be produced if methyl salicylate is limiting?

How many moles of salicylic acid can be produced if water is limiting?

Which is the limiting reagent: methyl salicylate or water

  1. 👍 0
  2. 👎 0
  3. 👁 153
asked by Lena
  1. Convert grams methyl salicylate to moles. moles = grams/molar mass.

    Convert grams H2O to moles. same process.

    Using the coefficients in the balanced equation, convert moles methyl salicylate to moles salicylic acid (SA). The coefficients are 1:1 which means moles methyl salicylate will be the same as the moles of SA. This procedure effectively tells you that if all 3.89 g methyl salicylate reacted with an excess of NaOH, then ?? moles SA would be formed.

    Now do the same for the H2O, which tells you that if all of the H2O reacted with an excess of methyl salicylate, then ?? moles SA would be formed.

    The two numbers probably will not agree which means one of them is wrong. The correct answer, in limiting reagent problems, is ALWAYS the smaller value and the reagent producing that smaller value is the limiting reagent.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    student did the Synthesis of Salicylic Acid experiment using 3.93 g of methyl salicylate. This was the limiting reagent for his experiment. What is the theoretical yield of salicylic acid for his experiment? The theoretical yield

    asked by Lena on November 16, 2010
  2. Chemistry

    I had to miss a lab yesterday. Do you know of a website where I can virtually prepare methyl salicylate (oil of wintergreen)? The experiment involves salicylic acid + methyl alcohol + concentrated sulfuric acid + heat....then when

    asked by Stephanie on April 13, 2011
  3. chemistry

    in an experiment, 2.50g of salicylic acid is reacted with 10.31g of methanol. the yield of methyl salicylate, C8H8O3, is 1.27g. what is the percentage yield?

    asked by robert on October 13, 2012
  4. Chem

    In making the ester methyl salicylate, mathanol is reacted with salicylic acid. If 2 grams of salicylic acid is reacted with excess methanol, what mass of ester would you expect to achieve theoretically.. show work

    asked by Anonymous on March 29, 2010
  5. Chemistry

    A student carried out the synthesis of aspirin, starting with 3.22 g of salicylic acid. After carrying out the reaction, recrystallizing and then drying the product, the student obtained 3.65 g of aspirin. Calculate the percent

    asked by John on March 30, 2009
  6. chem

    Show the calculation of (1) the expected grams of salicylic acid (C7H6O3) formed in the reaction of 1.75 grams of methyl salicylate (C8H8O3) with excess NaOH and then show the calculation of (2) the % yield if the actual yield of

    asked by emily on March 12, 2015
  7. chemistry - synthesis of aspirin

    wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic

    asked by Priscilla on April 7, 2012
  8. Organic Chemistry

    A student obtains a yield of 79% from his salicylic acid. How many grams of salicylic acid will the student need to produce 135 g of aspirin?

    asked by patricia on May 10, 2014
  9. Chemistry

    Calculate the theoretical yield of aspirin to be obtained in this experiment, starting with 2.0 g of salicylic acid and 5.0 ml of acetic acid anhydride (density = 1.08 g/ml).

    asked by Sara on April 20, 2008
  10. Chem

    A student reacts 57g of salicylic acid with 21 mL of acetic anhydride producing 10.5g of acetyl salicylic acid. What is the percent yield of the reaction?

    asked by Kennedy on March 20, 2016

More Similar Questions