How to Calculate Solution Dilution (C1V1 = C2V2)
Calculate required stock reagent volumes step-by-step:
Enter Stock Conc C1
Input concentration of stock solution available in lab.
Enter Target Conc C2
Input desired working concentration.
Enter Target Vol V2
Input final solution volume in mL.
Compute V1 = C2V2 / C1
Pipette calculated volume V1 and dilute with solvent to V2 total volume.
Key Features & Laboratory Safety
C1V1 = C2V2 Equivalence
Rigorously computes conservation of solute mass during solvent addition.
Unit-Independent Matching
Supports Molarity (M), %, mg/L, and g/L concentrations seamlessly.
Acid Dilution Safety Warning
Includes standard safety reminders (Always Add Acid to Water).
Solution Chemistry Guide: The Dilution Law (C1V1 = C2V2)
When a concentrated stock solution is diluted by adding solvent, the amount of solute in moles remains constant:C1 × V1 = C2 × V2 ⇒ V1 = (C2 × V2) / C1
Frequently Asked Questions
?Why should you add acid to water instead of water to acid?
Diluting strong acid is exothermic. Adding water to concentrated acid can cause rapid boiling and dangerous splashing. Always add acid slowly to a larger volume of water ("AA - Add Acid").