Math is easy. The bench is where chemistry happens.

Every chemist knows C₁V₁ = C₂V₂.

So why do dilutions still fail?

Because the formula isn't the problem. The execution is.

Three traps I see in every lab — including mine:

Trap 1: The unit trap.
A stock at 100 µg/mL. You need 100 ng/mL. That's a 1000× dilution, not 100×. One missed "µ" and your dose is off by an order of magnitude. The formula is correct. The concentration isn't.

Trap 2: The "unpipettable" dilution.
C₁V₁=C₂V₂ says: take 1 µL of a 10 mM stock, add 999 µL buffer. Mathematically perfect. Physically insane — you're trusting a P10's lowest range for your entire experiment.

Trap 3: The wrong pipette.
A P200 delivers ~1-3% accuracy at the top of its range — but 3-5% near the bottom. If your "100 µL" is actually 95, your dilution is 5% off before you start.

Here's what I love about SciTuu's dilution calculator (scituu.com, free, runs in your browser):

C₁V₁ = C₂V₂
Stock:      100 µM
Target:     10 µM
Final:      1,000 µL

→ Pipette 100 µL stock + 900 µL diluent
→ Feasible with a P200 pipette

It doesn't just give you the number. It tells you whether the plan is actually executable — and with which pipette.

That tiny "Feasible with a P200" line saves more experiments than any spreadsheet ever will. Because it forces the question: is this dilution physically sane, or just mathematically correct?

Chemistry is a bench sport. The math is the easy part. The pipette is where experiments actually die.

What's the worst dilution mistake you've seen — or made? Asking for a lab that's definitely not judging.

#Chemistry #Dilution #LabLife #WetLab #Pipetting #SciTuu #LabAutomation #ChemistryMemes