Dilution law (moles of solute constant) (For same solute before and after dilution: initial moles = final moles → C₁V₁ = C₂V₂)

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For same solute before and after dilution: initial moles = final moles → C₁V₁ = C₂V₂ (consistent volume units)

What each symbol means

SymbolWhat it stands for
C_1Initial molarity
C_2Final molarity
V_1Initial solution volume
V_2Final solution volume

When to use this

Only solute amount fixed; volumes must be in same units (both mL or both L). Assumes additive volumes unless problem states otherwise.