Titration Calculator
Find unknown concentration of acid or base using n₁M₁V₁ = n₂M₂V₂. Free titration calculator with charts and breakdowns for chemistry students and professionals.
Titrant (Known Solution)
Analyte (Unknown Acid)
n-Factor (Ion Count)
About This Calculator
The Titration Calculator helps chemistry students, lab technicians, and researchers determine the unknown concentration of an acid or base solution using the standard acid-base titration formula n₁M₁V₁ = n₂M₂V₂. This formula relates the moles of H⁺ ions from the acid to the moles of OH⁻ ions from the base at the equivalence point of a titration experiment.
In a typical titration, a solution of known concentration (the titrant) is added from a burette to a measured volume of an unknown solution (the analyte) until the reaction reaches completion, signaled by a color change from an added indicator. The volume of titrant used, combined with the known concentration and the n-factors (number of H⁺ or OH⁻ ions per molecule), allows the calculator to compute the unknown analyte concentration using the formula: M₂ = (M₁ × V₁ × n₁) / (V₂ × n₂).
The n-factor accounts for polyprotic acids (like H₂SO₄ with 2 H⁺) and polybasic bases (like Ca(OH)₂ with 2 OH⁻). For monoprotic acid-base pairs (like HCl and NaOH), the formula simplifies to M₁V₁ = M₂V₂ since both n-factors equal 1. The calculator supports n-factors of 1, 2, and 3, covering common laboratory acids and bases.
Regional Notes: Titration calculations use universal stoichiometric formulas that apply worldwide. The concentration units (M = mol/L) and volume units (mL) are standard in chemistry laboratories across India, the United States, the United Kingdom, and all other countries. No region-specific constants are required for this calculator.
Frequently Asked Questions
How does the titration calculator find unknown concentration?
The calculator uses the acid-base titration formula n₁M₁V₁ = n₂M₂V₂, where n is the number of H⁺ or OH⁻ ions per molecule, M is molarity in mol/L, and V is volume in mL. At the equivalence point, the moles of H⁺ from the acid equal the moles of OH⁻ from the base. Enter the known titrant concentration, titrant volume used, analyte volume, and n-factors to compute the unknown analyte concentration.
What inputs does the titration calculator need?
Enter the titrant concentration (M), titrant volume used in the burette (mL), the analyte volume (mL), and select the appropriate acid and base n-factors (number of H⁺ or OH⁻ ions per molecule). Choose whether the titrant is an acid or a base. The calculator then determines the unknown concentration of the analyte solution.
What is n-factor in titration calculations?
The n-factor is the number of H⁺ ions an acid can donate or OH⁻ ions a base can donate per molecule. HCl and NaOH have n-factor 1. H₂SO₄ has n-factor 2 (donates 2 H⁺). Ca(OH)₂ has n-factor 2 (donates 2 OH⁻). H₃PO₄ has n-factor 3. The n-factor is essential for correctly applying the equivalence formula.
What is the difference between titration and neutralization?
Titration is a laboratory technique where a solution of known concentration (titrant) is added to an unknown solution (analyte) until the reaction is complete, indicated by a color change. The volume of titrant used helps calculate the unknown concentration. Neutralization is the chemical reaction between an acid and a base that produces salt and water. Titration uses neutralization reactions to determine unknown concentrations.
What is the equivalence point in a titration?
The equivalence point is when the number of moles of H⁺ from the acid equals the number of moles of OH⁻ from the base. At this point, n₁M₁V₁ = n₂M₂V₂ holds true. An indicator like phenolphthalein changes color near the equivalence point, signaling the endpoint of the titration.
How do I choose the right indicator for my titration?
For strong acid-strong base titrations, use phenolphthalein (pH range 8.3–10.0) or bromothymol blue (6.0–7.6). For strong acid-weak base, use methyl orange (3.1–4.4). For weak acid-strong base, use phenolphthalein. The indicator must change color within the pH range of the equivalence point for accurate results.
Can I use this calculator for redox titrations?
This calculator is designed for acid-base titrations using the n₁M₁V₁ = n₂M₂V₂ formula. For redox titrations, a different stoichiometric approach based on electron transfer (number of electrons gained or lost) is needed, though the underlying principle of moles of oxidizer equaling moles of reducer is similar.