🧪 Solutions, Acids & Kinetics Calculators
Molarity, pH, buffers, equilibrium, kinetics and electrochemistry. Browse 73 free solutions, acids & kinetics calculators, each with the formula, a worked example and an interactive chart.
Molarity CalculatorFind molarity from moles and volume.Molarity from Mass CalculatorFind molarity from solute mass and molar mass.Mass to Weigh for a Solution CalculatorFind grams needed to prepare a solution of a target molarity.Molality CalculatorFind molality from solute moles and solvent mass.Mole Fraction CalculatorCompute mole fraction in a binary mixture.Normality CalculatorCompute normality from molarity and equivalents.pH CalculatorCompute pH, pOH and ion concentrations from hydrogen ion concentration.pH from Hydroxide Concentration CalculatorFind pH of a base from [OH⁻].Strong Acid or Base pH CalculatorFind pH of a strong acid or strong base solution.Weak Acid pH CalculatorFind the pH of a weak acid from Ka.Weak Base pH CalculatorFind the pH of a weak base from Kb.Buffer pH (Henderson–Hasselbalch) CalculatorFind buffer pH from pKa and concentrations.pKa and Ka ConverterConvert between Ka and pKa.Titration CalculatorFind unknown concentration from a titration volume.Strong Acid–Strong Base Titration pH CalculatorCompute the pH at any point of a strong acid titration with strong base.Solubility Product (Ksp) CalculatorFind molar solubility of a 1:1 salt from Ksp.Common Ion Effect Solubility CalculatorFind the reduced solubility in the presence of a common ion.Osmotic Pressure CalculatorCompute osmotic pressure of a solution.Boiling Point Elevation CalculatorFind how a solute raises the boiling point.Freezing Point Depression CalculatorFind how a solute lowers the freezing point.Raoult's Law CalculatorFind vapor pressure of a solution.Henry's Law Gas Solubility CalculatorFind dissolved gas concentration from pressure.Reaction Rate Law CalculatorCompute reaction rate from rate constant and concentrations.First-Order Reaction CalculatorFind concentration and half-life for a first-order reaction.Second-Order Reaction CalculatorFind concentration and half-life for a second-order reaction.Arrhenius Equation CalculatorFind rate constant at a temperature from activation energy.Activation Energy from Two Rates CalculatorFind activation energy from rate constants at two temperatures.Equilibrium Constant (Kc) CalculatorCalculate Kc from concentrations for aA + bB ⇌ cC + dD.Kp and Kc ConverterConvert between Kp and Kc.Nernst Equation CalculatorFind cell potential under non-standard conditions.Electrolysis (Faraday's Law) CalculatorFind mass deposited during electrolysis.Standard Cell Potential CalculatorFind standard cell EMF from half-cell potentials.Ionic Strength CalculatorCompute ionic strength of a salt solution.Beer–Lambert Law CalculatorFind concentration from absorbance.Absorbance and Transmittance ConverterConvert between percent transmittance and absorbance.Serial Dilution CalculatorCompute concentration after repeated dilutions.Mixing Acid and Base CalculatorFind the resulting pH after mixing strong acid with strong base.Weak Acid Percent Ionization CalculatorFind the hydrogen ion concentration and percent ionization of a weak acid from its Ka and concentration.Precipitation Test with Ion Product CalculatorCheck whether a precipitate forms when two solutions are mixed, by comparing the ion product with Ksp.Molar Conductivity CalculatorFind the molar conductivity of an electrolyte from its measured conductivity and concentration.Conductivity from Resistance and Cell Constant CalculatorFind the conductance and conductivity of a solution from its measured resistance and the conductivity cell constant.Eyring Equation Rate Constant CalculatorFind the rate constant of a reaction from its free energy of activation using transition state theory.Zero Order Half-Life CalculatorFind the half-life and the time to 75 percent completion of a zero-order reaction.Pseudo First Order Rate Constant CalculatorFind the effective first-order rate constant when one reactant is in large excess.First Order Time to Reach a Fraction CalculatorFind how long a first-order reaction takes to leave a given fraction of reactant.Reaction Order from Rate Data CalculatorFind the order of a reaction with respect to a reactant from two rate measurements at different concentrations.Equilibrium Dissociation Extent CalculatorFind how much a substance dissociates at equilibrium from its equilibrium constant and starting concentration.Van t Hoff Equilibrium Constant Change CalculatorEstimate how an equilibrium constant changes with temperature from the reaction enthalpy.Crystallization Recovery CalculatorFind how many grams of crystals form when a hot saturated solution is cooled.Buffer Ratio for Target pH CalculatorFind the base to acid ratio needed in a buffer to reach a target pH.Electroplating Mass and Thickness CalculatorFind the mass and coating thickness deposited by an electric current over time.Electrolyte Osmolarity CalculatorEstimate the osmolarity of an electrolyte solution from its molarity, ions per formula unit and osmotic coefficient.Activity Coefficient Calculator (Debye-Hückel)Estimate the activity coefficient of an ion in solution from its charge and the ionic strength.Electrolysis Current Required CalculatorFind the current needed to deposit a given mass of metal in a set time.Concentration After Half-Lives CalculatorFind the amount of a substance left after a given number of half-lives.Calcite Saturation Index CalculatorFind whether calcium carbonate will precipitate or dissolve from the saturation index.Buffer Capacity CalculatorFind how strongly a buffer resists pH change, the buffer capacity beta.Molar Mass from Freezing Point Depression CalculatorFind the molar mass of a solute from the freezing point drop it causes in a solvent.Molar Mass from Osmotic Pressure CalculatorFind the molar mass of a dissolved polymer or solute from its osmotic pressure.Acid Ka from Measured pH CalculatorFind the acid dissociation constant of a weak acid from its measured pH and concentration.Free Energy Change from Concentration Change CalculatorFind the Gibbs energy change when the concentration of a solute is changed at a set temperature.Reaction Enthalpy at Another Temperature CalculatorEstimate a reaction enthalpy at a new temperature using the heat capacity change of the reaction (Kirchhoff law).Trouton Rule Enthalpy of Vaporization CalculatorEstimate the enthalpy of vaporization of a liquid from its normal boiling point using Trouton rule.Gibbs Phase Rule CalculatorFind the degrees of freedom of a system from its number of components and phases.Lever Rule Phase Fraction CalculatorFind the fraction of each phase in a two-phase region from the overall and phase compositions.Antoine Equation Vapor Pressure CalculatorFind the vapour pressure of a liquid at a temperature using the Antoine equation. Defaults are for water.Debye Screening Length CalculatorEstimate how far electric charges are screened in an aqueous electrolyte at 25 °C from the ionic strength.Equilibrium Constant from Rate Constants CalculatorFind the equilibrium constant and standard free energy change from forward and reverse rate constants.Mole Fraction to Molarity CalculatorConvert the mole fraction of a solute in a binary solution into molarity, using the solution density.Fraction of Molecules Above Activation Energy CalculatorFind the fraction of molecules with enough energy to cross an activation barrier at a given temperature.Hydroxide Precipitation pH CalculatorFind the pH at which a metal hydroxide starts to precipitate from its solubility product.Dissolved CO₂ and Water pH CalculatorEstimate the pH of water in equilibrium with the air at a given CO₂ level, from Henry law and carbonic acid.Calibration Curve Concentration CalculatorConvert a measured absorbance or signal into concentration using a linear calibration line.
About Solutions, Acids & Kinetics calculators
Molarity, pH, buffers, equilibrium, kinetics and electrochemistry. CalcDepo has 73 free solutions, acids & kinetics calculators. Each one shows the formula, the variables and their units, a worked example and a chart of how the result changes, so you can check homework, plan a lab or understand the idea behind the numbers.
Popular calculators here include Molarity, Molarity from Mass, Mass to Weigh for a Solution, Molality, Mole Fraction, Normality. Common searches in this category include “concentration of a solution”, “how to make a molar solution”, “how much salt to dissolve”, “mol per kg solvent”.
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