Concentration is a physical property of substances that describes the amount of solute dissolved in a given volume of solvent. It can be expressed as mass per unit volume (e.g., kg/m^3) or molarity (nM). Concentrations are typically measured using instrumentation or analyzed by spectrometry. The concentration is often specified as a value at equilibrium, such as 6N = 1:6 molal solution, which means that there are six moles of solute per liter of solution at equilibrium with its saturated vapor phase.

Definition – What is it?

Concentration is the amount of solute dissolved in a given volume of solvent. When we refer to the concentration, we are talking about the amount of solute present in a solution, not how much liquid there is. The unit for concentration is mol/L (moles per liter). For example: if you have 5 moles of sugar dissolved in 100 mL of water, your sugar solution will have a sugar concentration of 0.5 M (molarity).

Qualitative description

The qualitative description is an important part of the concentration calculator. It provides information on what the chemicals in your mixture are and how they behave when they come into contact with each other. A qualitative description describes what happens when two chemicals in a reaction come into contact with each other, rather than how fast it happens or how much energy is released. A qualitative description can be useful for identifying unknown compounds, understanding what takes place during chemical reactions, and examining the results of these reactions.

  • What does it mean? When describing mixtures of chemicals using a qualitative method, we classify them based on their appearance and behavior in certain conditions:
  • Appearance: Molecules may have different colors or textures depending on their chemical makeup (e.g., red crystals or green liquid).
  • Behavior: Some substances dissolve well in water; others do not at all (e.g., sugar vs salt).


Molarity is a measure of concentration. It tells you how many moles of solute are in one liter of solution. The molarity of a solution is dimensionless and unitless, which means that it can be expressed as either M or mol/L (moles per liter). The symbol for molarity is M.

A mole is the amount of substance that contains exactly 6.02 x 10^23 particles or atoms that have a mass of 1 gram each. To determine the number of moles in a sample, multiply its mass (in grams) by its molar mass (in grams/mole).

For instance, if you have a solution of glucose in water and you want to know how much of it is dissolved in the solvent, your best bet would be to use the volume fraction method. However, if the goal is simply to find out how many grams (or ounces or whatever) of substance are present per liter of solution, then mass fraction would be a better choice. If you want something even more precise than that—say, how many moles (or millimoles) there are per liter—then molarity would give an answer within just a few decimal places!


What is concentration in science definition?

Concentration is the amount of a substance, that is in a certain amount of tissue or liquid.

What is the concentration in a solution?

The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution.

What are the units for concentration?

Quantitative units of concentration include molarity, molality, mass percentage, parts per thousand, parts per million, and parts per billion.