Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance of 0.724 is recorded. When 0.00167 g of Vitamin A is dissolved in 250. mL of solvent, an absorbance of 1.018 is recorded. Calculate the mass percent of Vitamin A in fish-liver oil.

Question

Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance of 0.724 is recorded. When 0.00167 g of Vitamin A is dissolved in 250. mL of solvent, an absorbance of 1.018 is recorded. Calculate the mass percent of Vitamin A in fish-liver oil.

I have no idea where to go with this for an equation. any assistance would be greatly appreciated.

Answer 1

even greater than their use of human food, fish oil are a vital source of

a. lotion and cream
b. fertilizer
c. lamp oil
d. industrial lubricants

Answer 2

The Crimean war was fought by

Answer 3

To calculate the mass percent of Vitamin A in fish-liver oil, we need to compare the absorbance of the solution of fish-liver oil with the absorbance of the solution of pure Vitamin A. We can assume that the absorbance is directly proportional to the concentration of Vitamin A in the solution.

First, let's calculate the concentration of Vitamin A in the fish-liver oil solution and the pure Vitamin A solution.

In the case of the fish-liver oil solution:
Concentration of Vitamin A = Mass of Vitamin A in fish-liver oil / Volume of solvent

Given:
Mass of fish-liver oil = 0.1232 g
Volume of solvent = 500. mL = 0.5 L (since 1 L = 1000 mL)

Concentration of Vitamin A in fish-liver oil = 0.1232 g / 0.5 L = 0.2464 g/L

Now, let's calculate the concentration of Vitamin A in the pure Vitamin A solution:

Mass of pure Vitamin A = 0.00167 g
Volume of solvent = 250. mL = 0.25 L

Concentration of pure Vitamin A = 0.00167 g / 0.25 L = 0.00668 g/L

Next, let's determine the ratio of the absorbance of the fish-liver oil solution to the absorbance of the pure Vitamin A solution:

Absorbance ratio = Absorbance of fish-liver oil solution / Absorbance of pure Vitamin A solution
Absorbance ratio = 0.724 / 1.018

Now, let's calculate the mass percent of Vitamin A in fish-liver oil using the following equation:

Mass percent = (Concentration of Vitamin A in fish-liver oil / Concentration of pure Vitamin A) * (Absorbance ratio)

Mass percent = (0.2464 g/L / 0.00668 g/L) * (0.724 / 1.018)

Mass percent ≈ 87.23%

Therefore, the mass percent of Vitamin A in fish-liver oil is approximately 87.23%.