Question

Calculate the mass/mass percent of a saturated solution of NaCl. Use the data from Table 9.2.1 "Solubilities of Various Solutes in Water at 25°C (Except as Noted)", assume that masses of the solute and the solvent are additive, and use the density of H₂O (1.00 g/mL) as a conversion factor.

Table 9.2.1 below
NaCl(s) 36.0

Answer 1

The mass/mass percent of NaCl in the saturated solution at 25°C is 26.47%, calculated by dividing the mass of NaCl (36.0 g) by the total mass of the solution (136.0 g) and multiplying by 100%.

Step-by-step explanation:

To calculate the mass/mass percent of a saturated solution of NaCl, we first need to understand the concept of mass percent, which is the mass of the solute divided by the total mass of the solution, multiplied by 100. Referring to the data provided, if we have a figure indicating that a saturated solution at 25°C contains 36.0 g of NaCl per 100 g of water, we can use this to calculate the mass percent.

The mass of the NaCl is already given as 36.0 g. To find the total mass of the solution, we add the mass of NaCl to the mass of the water, which is the solvent. Therefore, the total mass of the solution equals 36.0 g of NaCl + 100 g of water, which is 136.0 g. The mass/mass percent of NaCl in the solution is then calculated as follows:

Mass percent = (mass of NaCl / total mass of solution) × 100%

Mass percent = (36.0 g / 136.0 g) × 100%

Mass percent = 26.47%

Thus, the mass/mass percent of NaCl in the saturated solution at 25°C is 26.47%.