How much gentian violet is required to prepare 100 ml of a 1:10,000 solution?

To prepare a 1:10,000 solution, you need to understand that the ratio indicates how many parts of solvent are combined with one part of solute. In this case, a 1:10,000 solution means that 1 part of the solute (gentian violet) is present in a total of 10,000 parts of the solution.

To find out how much gentian violet is needed for 100 ml of a 1:10,000 solution, it’s helpful to convert the final volume into a consistent unit with the ratio. Since 1 ml of water roughly equals 1 g, you calculate the grams in 100 ml, which is approximately 100 g or 100,000 mg.

Now, since the solution requires 1 part of gentian violet in 10,000 parts of solution, you can find the amount needed by dividing 100,000 mg by 10,000:

100,000 mg ÷ 10,000 = 10 mg.

Thus, to prepare 100 ml of a 1:10,000 solution, 10 mg of gentian violet is needed, confirming that the correct answer is indeed 10 mg. Understanding this ratio and the conversion to mill