Rate Constant Calculator (k from Half-Life) Convert half-life (t½) to the rate constant (k) for common reaction orders. Inputs Reaction settings Reaction order 0th order k units: concentration/time 1st order (default) k units: 1/time 2nd order k units: 1/(concentration·time) Half-life (t½) sminhday Must be numeric and > 0. Initial concentration ([A]₀) MmMµMmg/Lcustom Shown for 0th … Read more
Diffusion Rate Calculator Fick’s First Law • Calculates Flux (J) and Rate (R) + optional trend graph Fick’s Law Diffusion coefficient (D) m²/s Scientific notation supported (example: 1e-9). Surface area (A) m²cm² Used for Rate: R = J × A. Concentration (C₁) mol/m³mol/L (M)mmol/L C₁ and C₂ share the same units. Concentration (C₂) ΔC = … Read more
Henderson-Hasselbalch Buffer Preparation Calculator Henderson-Hasselbalch Buffer Preparation Calculator Buffer Properties Target pH pKa of Weak Acid Total Buffer Concentration mMM Final Volume mLL Component Molecular Weights Weak Acid (HA) Molar Mass g/mol Conjugate Base (A⁻) Molar Mass g/mol Calculate Masses Reset Buffer Preparation Mass of Weak Acid (HA) Mass of Conjugate Base (A⁻) Step-by-Step Breakdown … Read more
Osmolarity Adjustment Calculator Osmolarity Adjustment Calculator Initial Solutes + Add Solute Total Final Volume of Solution mLL Adjusting Agent Sodium Chloride (NaCl)Dextrose (Anhydrous) Calculate Adjustment Reset Calculation Result Amount of Adjusting Agent to Add Step-by-Step Breakdown Osmolarity, Tonicity & Pharmaceutical Preparations Osmolarity is a measure of the total number of solute particles per liter of … Read more
Isotonicity Adjustment Calculator NaCl Equivalent Method Freezing Point Depression Total Final Volume of Solution (V) mL Substances + Add Substance Total Final Volume of Solution (V) mL Substances + Add Substance Calculate NaCl Needed Reset Calculation Result Amount of NaCl to Add Step-by-Step Breakdown Isotonicity Adjustment Isotonicity refers to the property of a solution having … Read more
Ion Concentration from Conductivity Calculator Ion Concentration from Conductivity Calculator Measured Solution Conductivity (κ) S/mS/cmµS/cm Cation (+) Information Stoichiometric Number (ν+) Ionic Conductivity (λ°+) S·cm²/molS·m²/mol Anion (-) Information Stoichiometric Number (ν–) Ionic Conductivity (λ°–) S·cm²/molS·m²/mol Calculate Concentration Reset Calculation Result Molar Concentration of Salt (c) Individual Ion Concentrations Cation (+) Concentration Anion (-) Concentration Step-by-Step … Read more
Conductivity & Concentration Calculator Conductivity ↔ Concentration Calculator Simple Conversion Kohlrausch’s Law Solve for: Conductivity (κ)Concentration (c)Molar Conductivity (Λm) Conductivity (κ) S/mS/cmµS/cm Concentration (c) mol/L (M)mol/m³ Molar Conductivity (Λm) S·m²/molS·cm²/mol Calculates Conductivity (κ) using: Λm = Λ°m – K√c, then κ = Λm * c Limiting Molar Conductivity (Λ°m) Kohlrausch Constant (K) Concentration (c) mol/L … Read more
Spectrophotometric Dilution Calculator Spectrophotometric Dilution Calculator Stock Solution Absorbance (A₁) (unitless) Target Absorbance (A₂) (unitless) Final Volume (V₂) mLLµL Calculate Volumes Reset Dilution Results Volume of Stock (V₁) Volume of Diluent Step-by-Step Breakdown Dilution Using Absorbance This calculator helps you determine the volumes needed to dilute a stock solution to a desired final absorbance, utilizing … Read more
pKa Finder from Titration Curve & Henderson-Hasselbalch Calculator pKa Finder & Henderson-Hasselbalch Calculator Interactive Titration Curve Tooltip text Hover over the points to learn more. Henderson-Hasselbalch Calculator pH = pKa + log₁₀([A⁻]/[HA]) Calculate pH Calculate pKa Calculate [A⁻] Calculate [HA] pH pKa [A⁻] (Conjugate Base Concentration, M) [HA] (Weak Acid Concentration, M) Calculate Reset Calculator … Read more
Rf Value Percentage Difference & Error Calculator Rf Value Percentage Difference & Error Calculator Percentage Difference Percentage Error Experimental Rf Value 1 Experimental Rf Value 2 Experimental Rf Value Theoretical (Literature) Rf Value Calculate Reset Calculation Result Percentage Formula Used Step-by-Step Breakdown Comparing Rf Values Calculating the Percentage Difference or Percentage Error for Retention Factor … Read more
