A salt solution is made by dissolving 50g of the salt in 250cm3 of water. Calculate the density of the solution kgm-3.

Answer 1

To calculate the density of the solution, we need to know the total volume of the solution and its total mass.

The total volume of the solution is 250 cm3 (given).

The total mass of the solution is the sum of the mass of salt and the mass of water:

Mass of salt = 50 g
Mass of water = volume × density = 250 cm3 × 1 g/cm3 = 250 g

Total mass of solution = Mass of salt + Mass of water = 50 g + 250 g = 300 g

Now we can calculate the density of the solution:

Density = mass / volume = 300 g / 250 cm3 = 1.2 g/cm3

But the question is asking for the density in kg/m3, so we need to convert the units:

Density = 1.2 g/cm3 × 1000 kg/m3 / 1000 g/cm3 = 1200 kg/m3

Therefore, the density of the salt solution is 1200 kg/m3.