How many grams of H2SO4 and water do you need to take to make a 200g 25% solution?

The mass of the acid solution is 200 grams;

To find the mass of the acid, it is necessary to multiply its mass fraction by the mass of the solution.

m acid = 200 x 0.25 = 50 grams;

To find the mass of water, you need to subtract the mass of the acid from the mass of the solution:

m of water = 200 – 50 = 150 grams;

Check: 150 + 50 = 200;