How much H2SO4 is required to make 225 mL of a 2% solution?

To determine how much H2SO4 (sulfuric acid) is required to make a 225 mL solution at a 2% concentration, you first need to understand what a 2% solution means in this context. A 2% solution by mass indicates that there are 2 grams of solute (H2SO4) in every 100 mL of solution.

Let’s break down the calculation for the desired 225 mL of a 2% solution:

1. Calculate the mass of H2SO4 needed per 100 mL:

   • Since it's a 2% solution, this equates to 2 grams of H2SO4 in 100 mL.

2. Set up a proportion to find out how much is needed for 225 mL:

   • If 100 mL requires 2 grams, then 225 mL would require: [ \text{Mass of H2SO4} = \left(\frac{2 \text{ g}}{100 \text{ mL}}\right) \times 225 \text{ mL} = 4.5 \text{ g} ]

Thus, to prepare 225 m