1. hydrogen ion concentration

noun. The number of moles of hydrogen ions per cubic decimeter.
Synonyms
pH scale concentration pH
Antonyms
acidity alkalinity distribution decrease
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2. concentration

noun. (ˌkɑːnsənˈtreɪʃən) The strength of a solution; number of molecules of a substance in a given volume.
Synonyms
titre molar concentration molal concentration property M hydrogen ion concentration molality titer molarity
Antonyms
inattentiveness inattentive attentive enfranchisement outgoing

3. concentration

noun. (ˌkɑːnsənˈtreɪʃən) The spatial property of being crowded together.
Synonyms
tightness spatial arrangement denseness compactness spacing density
Antonyms
distribution leeward windward incoming appearance

4. concentration

noun. (ˌkɑːnsənˈtreɪʃən) Strengthening the concentration (as of a solute in a mixture) by removing diluting material.
Synonyms
pervaporation strengthening
Antonyms
weakening dilution catabolism

5. concentration

noun. (ˌkɑːnsənˈtreɪʃən) Increase in density.
Synonyms
compression rarefaction increase concretion compaction densification
Antonyms
decrease insolubility solubility isotropy anisotropy

6. concentration

noun. (ˌkɑːnsənˈtreɪʃən) Complete attention; intense mental effort.
Synonyms
absorption focus engrossment focussing attention direction specialism immersion focal point study focusing centering
Antonyms
emersion egress strength solvability unsolvability

7. concentration

noun. (ˌkɑːnsənˈtreɪʃən) Bringing together military forces.
Synonyms
gathering assembly assemblage
Antonyms
disassembly skew blur obscurity

8. concentration

noun. (ˌkɑːnsənˈtreɪʃən) Great and constant diligence and attention.
Synonyms
engrossment singleness assiduousness industry intentness assiduity diligence industriousness
Antonyms
unclearness soften softness indistinctness inattention

9. hydrogen

noun. (ˈhaɪdrədʒən) A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe.
Synonyms
atomic number 1 chemical element gas tritium H H2O water element
Antonyms
understate unleaded gasoline leaded gasoline defend fresh water
Etymology
hydrogen (English)
hydrogène (French)
-gène (French)
hydro- (French)
ὑδρο- (Ancient Greek (to 1453))

10. ion

noun. (ˈaɪˌɑːn, ˈaɪən) A particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons.
Synonyms
anion particle subatomic particle cation
Etymology
ion (English)
ἰόν (Ancient Greek (to 1453))
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