Solvent extraction was used to extract fat from butter. The original butter sample had a mass of 19.6 g. Following fat extraction, the remaining sample (not the fat) had a mass of 4.2 g. Calculate the percent fat (by mass) of butter.

Question

Yair Pratt

Chemistry

25 October, 21:02

Solvent extraction was used to extract fat from butter. The original butter sample had a mass of 19.6 g. Following fat extraction, the remaining sample (not the fat) had a mass of 4.2 g. Calculate the percent fat (by mass) of butter.

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Answers (1)

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Helena York · Answer 1

Percentage mass of fat (grams) ≈ 78.60 %

Explanation:

The mass of the whole butter is 19. g grams, this means the mass of the original butter before solvent extraction was 19.6 grams.

Mass of original butter = 19.6 grams

Following the extraction of fat, the remaining sample of the original butter mass reduced to 4.2 grams. This means the mass of the fat extracted from the butter is 19.6 grams - 4.2 grams = 15.4 grams.

The mass of the fat = 15.4 grams

Percentage mass of fat (grams) = mass of fat/mass of original butter * 100

Percentage mass of fat (grams) = 15.4/19.6 * 100

Percentage mass of fat (grams) = 1540/19.6

Percentage mass of fat (grams) = 78.5714285714

Percentage mass of fat (grams) ≈ 78.60 %