How to find the crude percent, percent recovery, and percent composition of benzoic acid and acetanilide if 2 grams of a mixture of benzoic acid and acetanilide was separated through separatory funnel and recrystallize and purified, but only 0.7g of benzoic acid was used to be purified?

You need to rephrase the question. It makes no sense to me as is.

What is a crude percent of a compound after doing an liquid -liquid extraction and purifying the compound? How to calculate crude percent? What is crude percent?

To find the crude percent, percent recovery, and percent composition of benzoic acid and acetanilide, you will need to perform a series of calculations based on the given information. Here's how you can proceed:

1. Calculate the crude percent of benzoic acid in the original mixture:
- Divide the mass of benzoic acid in the mixture (0.7g) by the initial mass of the mixture (2g).
- Multiply the result by 100 to obtain the crude percent.

Example: Crude Percent = (0.7g / 2g) * 100 = 35%

2. Calculate the percent recovery of benzoic acid after purification:
- Divide the mass of purified benzoic acid (0.7g) by the initial mass of benzoic acid used for purification (0.7g).
- Multiply the result by 100 to obtain the percent recovery.

Example: Percent Recovery = (0.7g / 0.7g) * 100 = 100%

3. Calculate the percent composition of benzoic acid in the purified sample:
- Divide the mass of purified benzoic acid (0.7g) by the total mass of the purified sample (which contains both benzoic acid and acetanilide).
- Multiply the result by 100 to obtain the percent composition.

Example: Percent Composition = (0.7g / Total Mass of Purified Sample) * 100

To find the percent composition of acetanilide in the purified sample, subtract the percent composition of benzoic acid from 100%.

Remember to determine the total mass of the purified sample accurately to obtain the correct percent composition.