Equation and purpose
Concentration as amount per volume of solution.
\[c = \frac{n}{V}\]
Concentration as amount per volume of solution.
REARRANGEMENTS
$n = cV$, $V = n/c$
Dimensional check: mol/L = M ✓
Variables and units
| Symbol | Quantity | Unit | Notes |
|---|---|---|---|
| c | c | — | — |
| n | n | — | — |
| V | V | — | — |
Conditions and limitations
V is solution volume, not solvent alone; T affects V slightly.
Worked example
0.250 mol in 0.500 L → 0.500 M.
Molarity
Concentration as amount per volume of solution.
Equation
Inline: $c = \frac{n}{V}$$
Variables
| Symbol | Quantity | Unit | Notes |
|---|---|---|---|
| molarity | mol·L⁻¹ (M) | — | |
| amount solute | mol | — | |
| volume solution | L | — |
Conditions and limitations
V is solution volume, not solvent alone; T affects V slightly.
Rearrangements
,
Dimensional check: mol/L = M ✓
Worked example
0.250 mol in 0.500 L → 0.500 M.
Steps: write equation → substitute with units → check dimensional consistency → report with correct significant figures.
Common errors
- Using mL without conversion
- Confusing molarity with molality
Related resources
- solutions-concentration topic
- Calculators — linked only when a real calculator implements this formula.
- Constants — sourced constants with version when values are required.
Sources
- NIST Physical Constants 2022 — CODATA.
Reviewed 2026-08-21 by Editorial Team; due 2027-08-21.
Common errors
- Using mL without conversion
- Confusing molarity with molality
RELATED FORMULAS
C
Chemistry Fundamentals Editorial TeamAuthor
E
Editorial Review BoardReviewer
Editorial Team — transparent review placeholder
Reviewed August 21, 2026
SOURCES
- [nist-2022]NIST Physical Constants 2022 (2022). NISThttps://physics.nist.gov/constants