You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used?
I think the answer is 37.5 by dividing 750/20 but I am not sure
Doesn't that depend upon the concentration of the 750 mL final solution?
I thought it did but that's all the question gives you
To find out how much stock was used to make a 750ml solution with a 20X stock, you can use the following equation:
Amount of Stock Used = Volume of Solution / Dilution Factor
Here, the volume of the solution is 750ml, and the dilution factor is given as 20X. So, simply divide the volume of the solution by the dilution factor to find the amount of stock used:
Amount of Stock Used = 750ml / 20
Performing the calculation, we get:
Amount of Stock Used = 37.5ml
Therefore, the correct answer is indeed 37.5ml.