The mass of hydroperite in a 32 percent solution is 12 g. Determine the mass of the solution.

All tasks of the same type with the presented one should be solved using proportions.

We know that hydropyrite, the mass of which in solution is 12 g, makes up 32% of the total mass of the solution. Let the total mass of the solution be x g. Now, based on these data, you can make the following proportion:

12 g is 32%;
x g is 100%.

Let us express x from the proportion we obtained and determine what it is equal to:

x = 12 * 100%: 32% = 1200/32 = (8 * 150) / (8 * 4) = 150/4 = 37.5 (g).

Answer: the mass of the solution is 37.5 g.