Mixed 250 g of 30% and 150 g of 20% sulfuric acid (H2SO4) solutions. Find the mass fraction

Mixed 250 g of 30% and 150 g of 20% sulfuric acid (H2SO4) solutions. Find the mass fraction of sulfuric acid in the resulting solution.

1. Let’s find the mass of pure sulfuric acid in the first solution:
250 * 0.3 = 75 grams;
2. Find the mass of pure sulfuric acid in the second solution:
150 * 0.2 = 30 grams;
3. The mass of sulfuric acid in the resulting solution is equal to:
75 + 30 = 105 grams;
4. The mass of the entire resulting solution is 400 grams.
5. Find the mass fraction of sulfuric acid in the resulting solution:
105/400 = 0.2625 (26.25%);
Answer: the mass fraction of H2SO4 in the resulting solution is 26.25%.