Serial dilution
10 mL of a 1.0 M stock is diluted to 100 mL. Then 10 mL of that solution is diluted to 100 mL. What is the final concentration?
Answer B: explanation for every choice
A
This applies a third 10-fold dilution.
B
Correct. Each step is a 10-fold dilution: 1.0 → 0.1 → 0.01 M.
C
This adds the dilution factors instead of multiplying them.
D
This is the concentration after only the first dilution.
TakeawaySerial dilutions multiply.
Equation usedMolarity and dilution
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