koncentracija

Koncentracija is a term used in several South Slavic languages to denote two related concepts: the state of being focused or attentive, and the amount of a substance present in a mixture. The word derives from Latin concentratio, via medieval Latin and vernacular forms, rooted in con- “together” and centrum “center”.

In science, concentration refers to the amount of solute in a given amount of solution or solvent. Expressions include molarity (moles per liter), molality (moles per kilogram of solvent), mass percent, and volume percent. The concentration of a solution affects reaction rates, equilibrium positions, and physical properties such as boiling point and color. Determination methods include titration, spectrophotometry, conductivity measurements, and chromatography.

In everyday language, concentration also means the ability to direct and sustain attention on a task. It is a cognitive skill influenced by fatigue, stress, lighting, and noise. People may enhance concentration by organizing work, minimizing distractions, taking breaks, and practicing focused attention techniques.