Calculate how much sodium chloride and how much water you need to take to prepare 50 g of 5% sodium chloride solution.

Determine the weight of the dissolved salt.

M salt = 50 x 0.05 = 2.5 grams;

Similarly, we find the weight of the solvent (water).

(In the calculations, we will make the assumption that the density of water is 1 gram / ml).

M water (solvent) = 50 x 0.95 = 42.5 grams = 42.5 ml;

Let’s check. To do this, add the masses of the components of the solution and get the mass of the required solution.

2.5 + 42.5 = 50;