Solution Dilution Calculator (C1V1 = C2V2)

Your details

Choose which variable you want to calculate. Provide the other three.
Both concentrations (C1 and C2) use this unit.
Both volumes (V1 and V2) use this unit.
Concentration of the starting stock solution.
Desired concentration of the diluted solution.
Total volume of the diluted solution you want to make.
Result
10 mL

The calculated unknown variable

Solvent to add (V2 - V1)90 mL
Dilution factor (C1 / C2)10
Dilution ratio1:10
Stock fraction10%
Stock (%)10%

Take 10 mL of stock solution.

  • A 10-fold dilution: straightforward to prepare in one step at the bench.
  • The stock solution makes up 10.00% of the final volume; the remainder is diluent (solvent).
  • Add 90 mL of solvent, then bring to final volume with additional solvent if needed, or add stock to a measured volume of solvent.
  • Verify your result with a quick mental check: moles of solute must be equal before and after dilution (C1 x V1 = C2 x V2).

Next stepAfter preparing the solution, verify concentration by spectrophotometry (Beer-Lambert law) or titration if accuracy is critical.

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