Chloride Concentration Unit Converter

Convert chloride (Cl⁻) concentration values between molarity (M), mass per volume (mg/L, g/L), parts-per-million (ppm), and other common lab units. Designed for students, researchers, and lab technicians. This tool runs entirely offline in your browser.

Educational only. Follow your lab SOPs and SDS.

Converter

Concentration Value

Use dot or comma for decimals. Scientific notation (1e-3) accepted.

Molar Mass of Chloride

35.45 g/mol

Cl⁻ = 35.45 g/mol. Fixed for conversions.

Decimal Places

Converted Values

Base molarity: 0.02821 M

Understanding Chloride Concentration

Chloride ion concentration is critical in water analysis, clinical chemistry, corrosion studies, and industrial processes. Accurate unit conversion prevents errors in reagent preparation and regulatory reporting.

How to Use This Tool

Enter your known chloride concentration value.
Select the corresponding unit from the dropdown.
Click "Convert". All equivalent concentrations are displayed.
Use "Copy Results" to log data in your notebook.

Example Conversions

100 ppm → 2.821 mM, 0.100 g/L (assuming aqueous solution, 1 ppm ≈ 1 mg/L).
0.5 M → 500 mM, 17.725 g/L, 17725 ppm.
150 mg/L → 4.232 mM, 0.150 g/L, 150 ppm.
1 wt% aqueous → 10 g/L, 0.2821 M, 282.1 mM.

Quick Reference Table

Live comparison: Enter a value above, see equivalents for common units.

Unit	Value	Common Use

Frequently Asked Questions

Are ppm and mg/L always equivalent for chloride?

For dilute aqueous solutions at room temperature, 1 ppm Cl⁻ ≈ 1 mg/L. This assumes solution density ≈ 1 g/mL. For concentrated brines or non-aqueous solvents, density correction is needed.

What is the difference between Cl and Cl₂ in concentration?

This tool converts chloride ion (Cl⁻) concentration. For chlorine gas (Cl₂) in solution, molar mass and stoichiometry differ. Ensure you are referencing the correct species.

How should I measure chloride in the lab?

Common methods include ion-selective electrodes (ISE), titration (Mohr, Volhard), and ion chromatography. Calibrate with known standards and follow instrument SOPs.

When does the wt% approximation fail?

Weight percent (wt%) assumes the solution's total mass is known. For very concentrated solutions (e.g., >20% NaCl), density changes significantly. Use measured density for precise conversions.

Formulas & Assumptions

Molar mass of Cl⁻: 35.45 g/mol (IUPAC standard atomic weight).
Molarity (M) ↔ g/L: g/L = M × 35.45.
ppm ↔ mg/L: For dilute aqueous solutions, ppm = mg/L (density = 1 g/mL).
wt% ↔ g/L: g/L = (wt% / 100) × density (assumed 1.00 g/mL for <5%).
Scientific notation: Inputs like "1e-3" are parsed as 0.001.
Rounding: Results rounded to selected decimal places; intermediate calculations use full precision.

Legal Disclaimer

For informational and educational purposes only. Estimates depend on your inputs and simplifying assumptions. This tool does not replace professional judgment, lab SOPs, or safety procedures. Always follow SDS guidance and institutional policies.

Sources & References: Common chemistry constants: R, N_A, F; Standard unit conversions and lab measurement best practices; General analytical chemistry and uncertainty concepts; Laboratory safety basics and SDS principles.

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Chloride Concentration Unit Converter

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