Question

If there are 20.1 grams of citric acid in 513 g of lemon juice, What is the percent by mass of citric acid (H3C6H5O7) in lemon juice (rounded to 3 sig.figs)

Answer 1

Step-by-step explanation:

Percent by mass is mass of the solute in 100 g of the solution.

So in this case:

mass of solute = 20.1

mass of solution = 513

The expression for calculating the percentage by mass is: % (m/m) = (mass of solute) / (mass of solution) x 100.

So:

% m/m = (20.1/513)*100

% m/m = 3.92%

Answer: % m/m = 3.92%