molar concentration

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molar concentration

A scientist carefully measures the molar concentration of a blue solution.

Definition
  1. Noun:
    • A measure of concentration in chemistry: Molar concentration is the amount of a substance (solute), measured in moles, present in one liter of solution. It is a standard unit for expressing the concentration of a chemical species in a solution.
Usage
  • Molar concentration is a fundamental concept in chemistry used to perform quantitative calculations involving solutions, such as in dilution, reaction stoichiometry, and equilibrium.
  • It is typically denoted by the symbol M (e.g., a 0.5 M solution) or by square brackets around the chemical formula (e.g., [NaCl]).
  • The formula for calculating molar concentration is: Molarity (M) = moles of solute / liters of solution.
Examples
  • Noun:
    • The experiment requires a sodium chloride solution with a molar concentration of 0.1 M.
    • To calculate the mass needed, you must first know the desired molar concentration and the volume of the solution.
    • Increasing the molar concentration of the acid will speed up the reaction.
Advanced Usage
  • "Standard solution": A solution whose precise molar concentration is known, used in titrations.
    • The chemist prepared a standard solution of potassium permanganate with a molar concentration of 0.02 M for the titration.
Variants and Related Words
  • Molarity (n): A synonym for molar concentration. The terms are often used interchangeably.
    • The molarity of the solution was too high for the sensitive assay.
  • Molality (n): A different concentration unit defined as moles of solute per kilogram of solvent, not per liter of solution.
  • Concentration (n): The general term for the amount of a substance per defined space. Molar concentration is a specific type of concentration.
Synonyms
  • Molarity: The most direct synonym.
  • Molar: Used adjectivally (e.g., molar solution).
Related Phrases
  • "Molar concentration of...": The standard phrasing to specify the solute.
    • We need to determine the molar concentration of hydroxide ions in the sample.
molar concentration

A scientist carefully measures the molar concentration of a blue solution.

Noun
  1. concentration measured by the number of moles of solute per liter of solution

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