how can you prepare 300ml of 15% h2so4 solution

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45 grams PURE H2SO4 in 300 mL solution BUT getting the 45 g PURE H2SO4 is another problem.

To prepare a 300ml of 15% H2SO4 (sulfuric acid) solution, you need to know the concentration of your stock solution and the volume needed.

Here's how you can calculate the amount of sulfuric acid needed:

Step 1: Determine the concentration of the sulfuric acid stock solution you have. Let's assume you have a 50% concentration of H2SO4.

Step 2: The volume of the concentrated H2SO4 needed can be calculated using the formula:

Volume of Concentrated Solution = (Desired Volume of Diluted Solution × Desired Percentage) / (Percentage of Concentrated Solution)

Plugging in the values:

Volume of Concentrated Solution = (300 ml × 15%) / 50%
Volume of Concentrated Solution = (300 ml × 0.15) / 0.50
Volume of Concentrated Solution = 90 ml

Step 3: Take 90 ml of the concentrated H2SO4 solution (50% concentration) into a container. Be cautious as sulfuric acid is highly corrosive and should be handled with care.

Step 4: Add water to the container until you reach the desired volume of 300 ml. In this case, you would add 300 ml - 90 ml = 210 ml of water.

Step 5: Mix the solution thoroughly, ensuring that the sulfuric acid is evenly distributed in the final solution.

That's it! You have prepared a 300ml of 15% H2SO4 solution using a 50% H2SO4 stock solution.