A sample of 5.00 g of cloves was steam distilled and produced 0.46 g of clove oi

Question

A sample of 5.00 g of cloves was steam distilled and produced 0.46 g of clove oil. The clove oil was analyzed by GC and found to have the peaks listed in the table below. A standard of eugenol was found to have a retention time of 3.43 minutes Number What is the percentage of clove oil present in these cloves. Use correct significant digits GC data 9.2 retention timepeak area (minutes) 2.30 3.43 5.32 (mVmin) 1.345 3.568 0.289 What is the percentage of eugenol present in this sample of clove oil. Use correct significant digits Number 68.5 What mass of eugenol was present in the 5.00 g sample of cloves? Use c digits Number t significant ncorrect.

Explanation / Answer

Mass of clove = 5.0 g

Mass of clove oil = 0.46 g

Retention time for eugenol = 3.43 minutes .

Area of the peak is proportional to the amount of the compound

Total peak area =5.202

peak area of eugenol=3.568

Percentage of clove oil in clove =( Mass of clove oil/Mass of clove ) x 100 = (0.46g/5.0g) x 100 =9.20%

Percentage of clove oil in clove =9.20%

percentage of eugenol = (peak area of eugenol/ Total peak area) X 100 = (3.568/5.202) x 100 = 68.589%

Percentage of eugenol in clove oil = 68.6%

Mass of clove oil = 0.46 g

Mass of eugenol present in 5g sample of clove = 68.6% of 0.46g =0.31556g

Mass of eugenol present in 5g sample of clove =0.316g

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