Category

# Chemistry

21 items

### Anti-Knock Index

Wolfram Research

The AntiKnock Index (AKI) or posted octane number (PON) is the headline octane rating shown on the pump in Canada, the United States, Brazil and some other countries.

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### Concentration to Parts per Million in Water

Wolfram Research

Molar concentration is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of the amount of substance in a given volume.

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### Dilution Equation with Added Volume

Wolfram Research

Dilution is a reduction in the pH of a chemical (gas, vapor, solution). It is the process of decreasing the concentration of a solute in solution, usually simply by mixing with more solvent. To dilute a solution means...

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### Dilution Equation

Wolfram Research

Dilution is a reduction in the pH of a chemical (gas, vapor, solution). It is the process of decreasing the concentration of a solute in solution, usually simply by mixing with more solvent. To dilute a solution means...

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### Expanded Boiling-Point Elevation Equation

Wolfram Research

Boiling-point elevation describes the phenomenon in which the boiling point of a liquid (a solvent) will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent...

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### First-Order Arrhenius Equation

Wolfram Research

The Arrhenius equation is a formula for the temperature dependence of reaction rates.

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### Freezing-Point Depression Equation Using Solvent Properties

Wolfram Research

Freezing-point depression is the process in which adding a solute to a solvent decreases the freezing point of the solvent.

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### Freezing-Point Depression Equation Using Cryoscopic Constant

Wolfram Research

Freezing-point depression is the process in which adding a solute to a solvent decreases the freezing point of the solvent.

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### Henderson–Hasselbalch Equation Using Log Acidity Constant

Wolfram Research

The Henderson–Hasselbalch equation describes the derivation of pH as a measure of acidity (using pKa, the negative log of the acid dissociation constant) in biological and chemical systems.

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### Henderson–Hasselbalch Equation Using Acidity Constant

Wolfram Research

The Henderson–Hasselbalch equation describes the derivation of pH as a measure of acidity (using pKa, the negative log of the acid dissociation constant) in biological and chemical systems.

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### Molarity-to-Density Formula

Wolfram Research

Molar concentration, also called molarity, amount concentration or substance concentration, is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of the amount of substance ...

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### Monoprotic Strong Acid-Strong Base Titration

Wolfram Research

A monoprotic strong acid–base titration is the determination of the concentration of an acid or base by exactly neutralizing the acid or base with an acid or base of known concentration.

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### Nernst Equation Using Reaction Quotient

Wolfram Research

The Nernst equation is an equation that relates the reduction potential of an electrochemical reaction (half-cell or full-cell reaction) to the standard electrode potential, temperature and activities (often approxima...

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### Nernst Equation Using Equilibrium Constant

Wolfram Research

The Nernst equation is an equation that relates the reduction potential of an electrochemical reaction (half-cell or full-cell reaction) to the standard electrode potential, temperature and activities (often approxima...

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### pH Using H+ Concentration

Wolfram Research

pH, the potential of hydrogen, is a numeric scale used to specify the acidity or basicity of an aqueous solution.

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### pH Using pOH

Wolfram Research

pH, the potential of hydrogen, is a numeric scale used to specify the acidity or basicity of an aqueous solution.

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### pKa Using Concentrations

Wolfram Research

An acid dissociation constant is a quantitative measure of the strength of an acid in solution. pKa refers to the logarithm of the acid dissociation constant.

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### pKa Using Acidity Constant

Wolfram Research

An acid dissociation constant is a quantitative measure of the strength of an acid in solution. pKa refers to the logarithm of the acid dissociation constant.

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### pOH

Wolfram Research

pOH, the potential of hydroxide ions, is a numeric scale used to specify the acidity or basicity of an aqueous solution.

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### Second-Order Arrhenius Equation

Wolfram Research

The Arrhenius equation is a formula for the temperature dependence of reaction rates.

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### Simple Boiling-Point Elevation Equation

Wolfram Research

Boiling-point elevation describes the phenomenon that the boiling point of a liquid (a solvent) will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent. Th...