\( t \) (i) How much diluent (in milliliters) must be added to prepare a 500,000 units \( / \mathrm{mL} \) strength? \( \square \) mL eBook

To prepare a 500,000 units/mL strength, you need to know the total amount of units you want to achieve and the concentration of your starting solution. Suppose you’re starting with a higher concentration, like 1,000,000 units/mL. If you want to prepare 10 mL of the desired dilution, you will need to mix 5 mL of the original solution with 5 mL of diluent. Always remember, the amount of diluent you need will vary based on your starting concentration! A common mistake in dilution calculations is forgetting to account for the final volume when calculating how much diluent to add. It’s crucial to remember that the total volume after diluting is equal to the desired final volume. Make sure to track your units and volumes carefully to achieve the correct concentration!