Question

A chemist mixes 84. g of water with 65. g of acetone and 45. g of acetic acid.
Calculate the percent by mass of each component of this solution.
Round each of your answers to 2 significant digits.

Water?
Acetone?
Acetic acid?

Answer 1

To calculate the percent by mass of each component, we first need to calculate the total mass of the solution:

Total mass = 84 g (water) + 65 g (acetone) + 45 g (acetic acid) = 194 g

Now we can calculate the percent by mass of each component:

Percent by mass of water = (84 g / 194 g) x 100% = 43.3%
Percent by mass of acetone = (65 g / 194 g) x 100% = 33.5%
Percent by mass of acetic acid = (45 g / 194 g) x 100% = 23.2%

Therefore, the percent by mass of each component in the solution is approximately:
Water: 43.3%
Acetone: 33.5%
Acetic acid: 23.2%