705 g of salt was dissolved in 4 l of water. Determine the mass fraction of salt in the solution.

Under normal conditions, 4 liters of water weighs 4,000 grams.

The solution consists of two components: 4000 grams of water and 705 grams of salt.

The mass of the solution is equal to the sum of their masses:

m solution = 4,000 + 705 = 4,705 grams.

To find the mass fraction of salt, we divide the mass of salt by the mass of the solution:

C = m salt / m solution = 705/4 705 = 0.1498 = 14.98%;