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…showed last 75 words of 1003 total…vinegar % mass of acetic acid in vinegar: 66.6 grams of acetic acid 1,000 grams vinegar x 100 = 6.66 % Conclusion: According to the results the label on the bottle is inaccurate. The percent of the acetic acid is 6.66 %. Therefore percent error (accepted value- measured value) accepted value was 33 %. However part of those may have been due to personal errors in the calculations or data. The most probable source of error would be inaccurate readings of the meniscus on the burets.