What is the weight percent of a caffeine solution made by dissolving 8.35 g of caffeine,C₈H₁₀N₄O₂,in 75 g of benzene,C₆H₆? A)0.010% B)0.011% C)10% D)11%

Question

Quizplus · Accepted Answer

To calculate the weight percent of caffeine in benzene solution, we need to use the formula:

Weight percent = (mass of solute / mass of solution) x 100%

where,
mass of solute = 8.35 g
mass of solution = 75 g + 8.35 g (since we added 8.35 g of caffeine to 75 g of benzene)

mass of solution = 83.35 g

Weight percent = (8.35 g / 83.35 g) x 100%
Weight percent = 0.1 x 100%
Weight percent = 10%

Therefore, the weight percent of caffeine in the benzene solution is 10%, which corresponds to answer choice C.

What Is the Weight Percent of a Caffeine Solution Made