Chemistry

Calculate molarity, mass, or volume for chemical solutions.

Look up fundamental properties of any chemical element from the periodic table.

Calculate the weighted average atomic mass of an element from its isotopes.

Calculate the average atomic mass of an element from the mass and abundance of its isotopes.

Determine the bond order of a diatomic molecule using Molecular Orbital Theory.

Get the systematic name for simple ionic and covalent chemical compounds from their formula.

Calculate the effective nuclear charge (Zeff) experienced by an electron.

Find the full and noble gas electron configuration for any element.

Calculate the electronegativity difference between two atoms to determine bond type.

Calculate the molar mass (molecular weight) of a chemical compound.

Determine the mass percent composition of each element in a compound.

Estimate the percent ionic character of a chemical bond based on electronegativity.

Convert between pKa, Ka, pKb, and Kb to understand acid and base strength.

Calculate the Air-Fuel Ratio (AFR) or Lambda value for combustion processes, essential for engine tuning.

Calculate the atom economy of a chemical reaction to measure its efficiency and green chemistry principles.

Convert between moles, grams, and the number of atoms or molecules using Avogadro's number.

Quickly convert mass in grams to moles for any chemical substance using its molar mass.

Calculate the hydrogen ion concentration [H+] from the pH of a solution.

Calculate the molality of a solution, defined as moles of solute per kilogram of solvent.

Determine the molar mass of an unknown gas using the ideal gas law with known pressure, volume, and temperature.

A fundamental chemistry tool to convert between mass, moles, and the number of particles (atoms/molecules).

Calculate the molecular weight (or molar mass) of any chemical compound by entering its formula.

Calculate the mole fraction of a component in a mixture, a key measure of concentration in chemistry.

Calculate the normality (equivalent concentration) of a solution, which is particularly useful for titration calculations.

Convert concentration from parts per million (PPM) to molarity (mol/L), a common task in analytical and environmental chemistry.

Estimate the activity coefficient of an ion in solution using the Debye-Hückel equation, which accounts for ionic interactions.

Use the alligation method to calculate the correct proportions for mixing two solutions of different concentrations to achieve a desired intermediate concentration.

Calculate the amount of bleach and water needed to create a disinfecting solution with a specific parts-per-million (PPM) concentration.

Estimate the buffer capacity of a solution using the Van Slyke equation, which measures its resistance to pH change.

Calculate the pH of a buffer solution using the Henderson-Hasselbalch equation, essential for creating stable chemical and biological systems.

Calculate the concentration of a solution in molarity, mass percent, or other units, or perform dilution calculations (M1V1=M2V2).

Calculate the dilution factor, initial volume, or final volume needed to perform a dilution.

Use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution from the pKa and the ratio of conjugate base to acid.

Calculate the mass percent (% w/w) of a solute in a solution, a common way to express concentration.

Calculate the amounts of two or more substances to combine based on a specific mixing ratio by volume or parts.

Calculate the volume or concentration of an acid or base needed to neutralize a solution in a titration reaction.

Convert a solution's concentration from a mass percentage (% w/w) to molarity (mol/L).

Calculate the mass of solute needed to create a solution of a specific mass/volume percent concentration (% w/v).

Calculate the pH of a solution from its hydrogen ion concentration [H+] or pOH. A fundamental tool in chemistry and biology.

Calculate the vapor pressure of an ideal solution based on the mole fractions and vapor pressures of its components, using Raoult's Law.

Determine the volume of diluent required to reconstitute a powdered medication or chemical to a desired concentration.

Calculate the saponification (SAP) value for fats and oils, which is essential for determining the amount of lye needed in soap making.

Plan a serial dilution by calculating the concentration at each step of the series.

Calculate the volume of a stock solution needed to dilute it to a desired final concentration using the M1V1=M2V2 formula.

Estimate the Total Dissolved Solids (TDS) in water from its electrical conductivity (EC). A key calculator for water quality assessment.

Analyze titration data by creating a titration curve and finding the equivalence point. A tool for determining the concentration of an unknown solution.

Convert water hardness between different units like parts per million (ppm), grains per gallon (gpg), and German degrees (°dH).

Calculate the activation energy of a reaction using the Arrhenius equation with rate constants at two different temperatures.

Determine the actual yield of a chemical reaction based on your experimental results and compare it to the theoretical yield.

Use the Arrhenius equation to calculate the rate constant, activation energy, or temperature of a chemical reaction.

Calculate the equilibrium constant (Kc or Kp) for a chemical reaction from the concentrations or partial pressures of reactants and products.

Calculate the equilibrium constant in terms of partial pressures (Kp) for a gas-phase reaction.

Determine the mole-to-mole ratio between reactants and products in a balanced chemical equation, essential for stoichiometry.

Calculate the percent yield of a chemical reaction by comparing the actual experimental yield to the theoretical yield.

Calculate the rate constant (k) of a reaction using the Arrhenius equation when the activation energy and temperature are known.

Calculate the reaction quotient (Qc or Qp) to determine the direction a reversible reaction will shift to reach equilibrium.

Calculate the theoretical yield of a product in a chemical reaction based on the stoichiometry and the amount of the limiting reactant.

Calculate the half-life of a substance undergoing first-order decay, or find the remaining amount after a certain time.

Analyze gas adsorption on a solid surface using the Langmuir isotherm model to determine adsorption capacity.

Calculate the remaining amount of a radioactive substance after a certain period using the half-life decay formula.

Estimate the age of an organic sample by calculating the decay of Carbon-14 using its known half-life.

Calculate the Chemical Oxygen Demand (COD) in a water sample, a key measure of water quality and pollution.

Determine the empirical formula of a compound from the masses of CO2 and H2O produced during combustion analysis.

Balance the chemical equation for the complete combustion of a hydrocarbon.

Calculate the degree of unsaturation (or double bond equivalent) for a molecule to determine the number of rings and/or pi bonds.

Calculate the Double Bond Equivalent (DBE) of a molecular formula to help determine its structure by finding the sum of rings and pi bonds.

Calculate the density of liquid ethylene at different temperatures, a tool for chemical engineering and cryogenics.

Calculate the volume of solvent needed to resuspend a dry compound to a target concentration.