Serial Dilution. PBA grade 12, Federal board

#Steps:
Prepare Stock Solution
Start with a concentrated solution,
for example, 1 M solution.
First Dilution
Take 1 mL of stock solution and add 1 mL of solvent (water or buffer).
The concentration becomes 0.5 M.
Repeat the Process
Take 1 mL from the new solution and add 1 mL solvent again.
Series of Dilutions
This produces a sequence of decreasing concentrations:1 M → 0.5 M → 0.25 M → 0.125 M → …