what mass of H2SO4 is contained in 25g of 15percent w/w solution?
% w/w = (grams H2SO4/1 g solution)*100.
15 = (grams H2SO4/25)*100
Solve for g H2SO4.
Mass of h2so4=1×2+32+16×4.
=98g
Mass of h2so4=25g/98g=0.26g
0.26×15/100
=0.038g
To find the mass of H2SO4 in a 15% w/w solution of H2SO4, follow these steps:
Step 1: Interpret the given information:
- The solution is 15% w/w (weight/weight), which means that 15 grams of H2SO4 is present in every 100 grams of solution.
- The total mass of the solution is given as 25 grams.
Step 2: Calculate the mass of H2SO4 using the given information:
- To find the mass of H2SO4 in the solution, multiply the percentage by the total mass of the solution.
- Mass of H2SO4 = (percentage of H2SO4 / 100) × total mass of the solution
= (15 / 100) × 25 grams
Step 3: Perform the calculation:
- Mass of H2SO4 = (15 / 100) × 25 grams
= 0.15 × 25 grams
= 3.75 grams
Therefore, there are 3.75 grams of H2SO4 in a 25-gram 15% w/w solution.
To find the mass of H2SO4 contained in a 15% w/w solution, you need to know the weight percent and the total mass of the solution. In this case, the total mass of the solution is given as 25g.
Step 1: Calculate the mass of the solution:
The weight percent (w/w) tells you that 15% of the total mass is H2SO4. This means that the remaining 85% is the solvent (usually water).
Mass of solution = (weight percent / 100) * total mass
Mass of solution = (15 / 100) * 25g
Mass of solution = 3.75g
Step 2: Calculate the mass of H2SO4:
Since 15% of the solution is H2SO4, you can find the mass of H2SO4 by multiplying the mass of the solution by the weight percent.
Mass of H2SO4 = (weight percent / 100) * mass of solution
Mass of H2SO4 = (15 / 100) * 3.75g
Mass of H2SO4 = 0.5625g
Therefore, the mass of H2SO4 contained in 25g of a 15% w/w solution is 0.5625g.