1) Starting from your solution 1 [S1], prepare 10mL of a 1/7 dilution.
2) Starting from your solution 2 [S2], prepare 25mL of a 0.004M dilution.
3) Starting from your solution 1 [S1], you have to prepare a 3 step serial dilution [SD] with a total dilution factor of 1/72. The volume and dilution factors of the three dilutions are: Dilution 1 [SD1]:
5mL, 1/4 Dilution 2 [SD2]:
