Calculate the mass of the solution and the mass fraction of the solute consisting of 13g. table salt and 1.2 liters water?

The density (d) of water is 1 kg / dm3. Let’s find the mass of water:

m (H2O) = V (H2O) * d (H2O) = 1.2 * 1 = 1.2 kg = 1200 g;

Find the mass of the solution:

m (solution) = m (H2O) + m (NaCl) = 1200 + 13 = 1213 g;

Let’s find the mass fraction of table salt:

w (NaCl) = m (NaCl) / m (solution) = 13/1213 = 0.0107 = 1.07%.

Answer: m (solution) = 1213 g; w (NaCl) = 1.07%.