Calculator catalog
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Found 76 calculators
Mass percent concentration
Calculates the solute mass fraction in a solution as mass percent.
Molar concentration
Calculates molar concentration from amount of substance and solution volume.
Mass concentration
Calculates mass concentration as solute mass divided by solution volume.
Volume percent concentration
Calculates component volume fraction in the total volume.
Mass ppm concentration
Calculates ppm as component mass divided by total mass and multiplied by 1,000,000.
Molar concentration from mass
Calculates molar concentration from solute mass, molar mass, and solution volume.
pH from [H+] concentration
Calculates pH as −log10([H+]) in the dilute-solution model.
[H+] concentration from pH
Calculates [H+] as 10^(−pH) in the dilute-solution model.
pOH from [OH−] concentration
Calculates pOH as −log10([OH−]) in the dilute-solution model.
[OH−] concentration from pOH
Calculates [OH−] as 10^(−pOH) in the dilute-solution model.
pH and pOH from pKw
Uses pH + pOH = pKw with editable pKw.
KA and pKa
Converts the acid dissociation constant and its negative decimal logarithm.
KB and pKb
Converts the base dissociation constant and its negative decimal logarithm.
Henderson–Hasselbalch equation
Calculates an acidic buffer pH from pKa and [A−]/[HA].
Basic acidic buffer
Calculates HA/A− buffer pH from Ka and both form concentrations.
Basic alkaline buffer
Calculates B/BH+ buffer pOH and pH from Kb, pKw, and both form concentrations.
Dilution C1V1 = C2V2
Calculates a simple solution dilution from conservation of concentration times volume.
Moles from mass and molar mass
Calculates amount of substance from mass and molar mass.
Mass from moles and molar mass
Calculates mass from amount of substance and molar mass.
Mole fraction
Calculates helper mole fraction from user-provided component moles and total moles.
Molality
Calculates molality as moles of solute per kilogram of solvent.
Normality with manual equivalent factor
Calculates normality from molarity and a manually supplied equivalent factor.
Equivalent mass
Calculates equivalent mass in g/eq or kg/eq from molar mass and a manually supplied equivalent factor.
Serial dilution
Calculates the overall factor and concentration after a whole number of repeated dilution stages.
Minimum dilution-stage count
Calculates the smallest whole number of stages required to reach a concentration no greater than the target.
Basic stoichiometric titration
Calculates C2 from C1·V1·n1 = C2·V2·n2.
Cell potential from half-cells
Calculates cell potential as cathode reduction potential minus anode reduction potential.
Nernst equation
Calculates potential from E⁰, absolute temperature T, electron count z, and quotient Q.
ΔG and cell potential
Calculates ΔG = −zFE.
Faraday's law
Calculates Q = n·z·F from amount of substance n and electron count z per entity.
Electrolysis deposited mass
Calculates mass from I, t, M, z, and current efficiency.
Electrolysis time
Calculates time required to deposit the specified mass.
Required electrolysis current
Calculates current for a specified mass and time.
Amount of substance from charge
Calculates amount of substance from charge Q and electron count z.
Beer–Lambert law
Calculates absorbance A from molar absorptivity ε, optical path length l, and molar concentration c.
Osmotic pressure
Calculates osmotic pressure from the van ’t Hoff equation for an ideal dilute solution.
Simple Raoult law
Calculates solvent partial pressure as its mole fraction times the pure-solvent vapour pressure.
Freezing-point depression
Calculates freezing-point depression from molality, the cryoscopic constant, and the van ’t Hoff factor.
Boiling-point elevation
Calculates boiling-point elevation from molality, the ebullioscopic constant, and the van ’t Hoff factor.
Water hardness conversion
Converts water hardness through the mg/L as CaCO3 base representation.
Hardness from Ca and Mg
Calculates hardness as CaCO3 from calcium and magnesium concentrations.
TDS from conductivity
Calculates TDS from EC and a manually supplied k_TDS factor.
Hydraulic retention time
Calculates HRT = V/Q for a tank or basin.
Pollutant load
Calculates mass load from flow rate and concentration using canonical units.
Tank volume from Q and HRT
Calculates required volume from flow rate and retention time.
Removal efficiency
Calculates percent removal from C_in and C_out.
Water stream mixing
Calculates mixed concentration as a flow-weighted average for a list of streams.
Component mass fraction
Calculates a component mass fraction from component mass and total mass.
Simple mixture density
Calculates average mixture density from total mass and total volume.
Component mass from mass fraction
Calculates component mass from mass fraction and total mixture mass.
Total mass from component fraction
Calculates total mass from component mass and its mass fraction.
Weighted two-component mixture property
Calculates a linear approximation of a user-provided mixture property from two component masses and properties.
Component volume from volume fraction
Calculates component volume from volume fraction and total volume.
Molar flow rate
Calculates molar flow from mass flow and molar mass.
Two-stream mixer mass balance
Calculates helper output mass flow as the sum of two user-provided streams.
Mixed concentration of two streams
Calculates helper mixed concentration as a flow-weighted average from user-provided values.
Residence time
Calculates helper residence time as volume divided by volumetric flow rate.
Reactor conversion
Calculates helper conversion from user-provided inlet and outlet moles.
First-order half-life
Calculates helper first-order half-life from a user-provided rate constant.
Arrhenius rate constant
Calculates helper rate constant from the Arrhenius equation using user-provided values.
CSTR first-order volume
Calculates ideal CSTR volume for a first-order reaction, constant density and supplied conversion.
PFR first-order volume
Calculates ideal PFR volume for a first-order reaction, constant density and supplied conversion.
Agitator power from power number
Calculates agitator power from power number, density, rotational speed in 1/s and impeller diameter.
Tank drain time by Torricelli
Calculates the time for liquid head to drop from initial to final height for a constant tank area.
Ideal gas moles
Calculates amount of substance from pressure, volume, temperature, and the universal gas constant.
Ideal gas density
Calculates ideal-gas density from pressure, molar mass, and temperature.
Gas molar volume
Calculates ideal-gas molar volume from temperature, pressure, and the gas constant.
Gas mass from moles and molar mass
Calculates gas mass from amount of substance and user-entered molar mass.
Partial pressure
Calculates helper partial pressure from user-provided mole fraction and total pressure.
Stoichiometric moles from reaction ratio
Calculates product moles from reactant moles and user-entered stoichiometric coefficients.
Simple limiting reactant
Compares available reaction extent for two components from entered moles and coefficients.
Limiting and excess reactant
Compares two reactant amounts divided by stoichiometric coefficients and reports the limiting reactant, remainder, and excess.
Theoretical yield mass
Calculates theoretical product mass from moles and user-entered molar mass.
Percent yield
Calculates percent yield from actual and theoretical product mass.
Chemical equation balancer
Exact atom balancing with the smallest whole-number stoichiometric coefficients.
Chemical formula parser
Element composition, atom-count and molar-mass analysis for formulae with groups and hydrates.