The Biochemical Components of Peanuts Experiment #9 Data & Report Sheet Extracti

Question

The Biochemical Components of Peanuts Experiment #9 Data & Report Sheet Extraction of Storage Fats from Peanuts Mass of Peanut Kernels Mass of Flask and Extracted Lipid Mass of Empty Erlenmeyer Flask b th g Mass of Lipid Extracted (Subtract mass of empty flask from mass of flask extracted lipid What is the percent of lats in these peanuts: percent (00% x mass of lipid extracted mass of peanut kernels used for extraction) or Calories with a capital C) of energy derived from fat in 100 g of peanuts by multiplying 9 kcal/g fat times the answer for percent of fats obtained above. How does this compare with nutritional information for foods (peanuts)? You may need to check a nutrition h or the internet for this information. B. Measuring Unsaturation of Fats in Peanuts What was the result when testing peanut oil with potassium permanganate? Was there any color change in the permanganate solution when added to the oil? Describe it. Yes buown Precipitation Would you say that peanuts contain unsaturated fatty acids? les, would

Explanation / Answer

a) % fat = Mass of fat X 100 / Mass of peanut = 2 X 100 / 6 = 33.33%

b) The energy derived will be = 33.33 X 9 = 299.97 KCal

c) KMnO4 reacts with double bond and get reduced to form brown coloured solution

d) Yes it must have double bond

e) Iondine test: it is shown by starch

f) Fehlings' tes: shown by reducing sugars

g) Felhling's test after hydrolysis: shown by polysachrides

h) Bials test: shown by pentoses and hexoses [glucose]

i) If in biuret test the peanuts show purple colour then it shows the presence of peptide bonds

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