To determine the iron content, a reference series (serial dilutions) with known amounts of iron (mg/L) is needed.

How do you prepare 100 mL of the solution in the table (list down below) from a standard solution with a concentration of 100 mg/mL? Show calculations, please.

There are available 100 mL measuring bottles, distilled water, full pipettes 1 mL, 3 mL, 5 mL, 10 mL, 20 mL. (How many mL of the original standard solution must be taken and diluted to 100 mL to obtain the solution in the table?)

desired concentration (mg/l) standard solution needed (mL) water added (mL)

10,0

7,5

5,0

3,0

2,5

1,0

0,5