Calculating Percent Acetic Acid by Weight in Vinegar: A Simple Guide

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SUMMARY

The discussion focuses on calculating the percent acetic acid by weight in vinegar, specifically using a density of 1.005 g/mL and an acetic acid molarity of 0.208 mol/L. Participants calculated that 0.208 moles of acetic acid corresponds to 13.3 grams, leading to a percent by weight of 17.0% when compared to the total weight of 78 grams of vinegar. Clarifications were made regarding the molar mass of acetic acid, which is 60.05 g/mol, impacting the calculations. The conversation emphasizes the importance of understanding molarity and weight conversions in chemistry.

PREREQUISITES
  • Understanding of molarity and its calculations
  • Knowledge of molar mass and its application in conversions
  • Familiarity with density and its role in solution calculations
  • Basic principles of weight percentage calculations
NEXT STEPS
  • Learn how to convert between molarity and percent by weight in solutions
  • Study the principles of density and its impact on solution concentration
  • Explore the calculation of moles from mass using molar mass
  • Investigate common laboratory techniques for measuring acetic acid concentration
USEFUL FOR

Chemistry students, laboratory technicians, and anyone involved in food science or vinegar production will benefit from reading this discussion.

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The molarity and percent by weight of the acetic acid in the vinegar. Use a value of 1.005 g/mL for the density of the vinegar.

Acetic acid molarity in vinegar = .208 mol / L

How do you calculate the Percent acetic acid by weight (using the acetic acid molarity)?

Thanks for the help.
 
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Assume you've got one liter of solution, to simplify things. How many moles of acetic acid is that? How many grams of acetic acid is that? How many grams of solution do you have? Should be easy to figure out from there.
 
RE

Well, I have .208 moles of solution and 13.3 g of Acetic acid . . . I have 78 grams of Vinegar so 13.3 / 78 = 17.0% ahh I see

thanks for the help

P.S. How do I become a chem super freak like you? :wink:
 
hey how did u get 13.3 g of acetic acid from 0.208 moles provided that the molar mass is 60.5 . since, moles = mass/molar mass
therefore , mass = 60.5 * 0.208 = 12.58 grams ?
i have an assignment due on this , in the next 3 hrs. please help someone ?
 
Molar mass is 60.05, which makes 13.3 even more difficult to understand.

Check how to convert percentage to molarity - you can solve final formula for percentage.
 

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