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Measure of acidity for very strong acids
The Hammett acidity function (H0) is a measure of acidity that is used for very concentrated solutions of strong acids, including superacids. It was proposed
Hammett_acidity_function
Measure of acidity
notably the Hammett acidity function, H0, for superacid media and its modified version H− for superbasic media. The term acidity function is also used
Acidity_function
Extremely strong acid
definition) is an acid with an acidity greater than that of 100% pure sulfuric acid (H2SO4), which has a Hammett acidity function (H0) of −12. According to
Superacid
Class of chemical compounds
times stronger than 100% pure sulfuric acid in terms of their Hammett acidity function values (H0 ≤ −18) and possess computed pKa values well below −20
Carborane_acid
Chemical compound
pure sulfuric acid by many orders of magnitude, according to its Hammett acidity function. It even protonates some hydrocarbons to afford pentacoordinate
Fluoroantimonic_acid
American chemist
of a scheme for comparing their acidities based on what is now known as the Hammett acidity function. The Curtin–Hammett principle bears his name. The awards
Louis_Plack_Hammett
Solution of hydrogen fluoride in water
formation of other polymeric species, H n−1F− n, is highly likely. The Hammett acidity function, H0, for 100% HF was first reported as −10.2, while later compilations
Hydrofluoric_acid
Measure of the tendency of an acid to dissociate
solute (most commonly a weak aniline base) is measured by its Hammett acidity function, the H 0 {\displaystyle H_{0}} value. Although these two concepts
Acid_strength
Measure of an acid's strength in solution
convenient acidity function. Other acidity functions have been proposed for non-aqueous media, the most notable being the Hammett acidity function, H0, for
Acid_dissociation_constant
Superacid system prepared from a Brønsted and a Lewis superacid
the Hammett acidity function. For instance, sulfuric acid, H2SO4, has a Hammett acidity function, H0, of −12, perchloric acid, HClO4, has a Hammett acidity
Magic_acid
Measure of the level of acidity or basicity of an aqueous solution
hydronium/lyonium ion. pH is an example of an acidity function, but others can be defined. For example, the Hammett acidity function, H0, has been developed in connection
PH
Chemical compound giving a proton or accepting an electron pair
strict definition refers only to the solute. A lower pH means a higher acidity, and thus a higher concentration of hydrogen cations in the solution. Chemicals
Acid
Acid derived from inorganic compounds
H3BO3 Perchloric acid HClO4 Hydrocyanic acid HCN Boyd, Claude E. (2020). "Acidity". Water Quality. pp. 215–231. doi:10.1007/978-3-030-23335-8_11. ISBN 978-3-030-23334-1
Mineral_acid
Topics referred to by the same term
in rail transport modelling Higgs boson, in physics, symbol H0 Hammett acidity function, in chemistry, H0 Hubble constant, in cosmology, H0 Null hypothesis
H0
Chemical bond theory
emphasize the kinetic aspect of reactivity, while the Lewis basicity and Lewis acidity emphasize the thermodynamic aspect of Lewis adduct formation. In many cases
Lewis_acids_and_bases
Chemical property
K'_{n}}}\end{aligned}}} For the derivation of the general binding equation a saturation function r {\displaystyle r} is defined as the quotient from the portion of bound
Dissociation_constant
Chemical added to show pH of a solution
halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually or spectroscopically
PH_indicator
Chemical property of reacting with either an acid or base
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Amphoterism
Extremely strong base
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Superbase
Organic compound with acidic properties
properties. The most common organic acids are the carboxylic acids, whose acidity is associated with their carboxyl group –COOH. Sulfonic acids, containing
Organic_acid
Chemical theory about acids and bases
Non-Aqueous Solvents. Pergamon Press. Reich, Hans J. "Bordwell pKa Table (Acidity in DMSO)". Department of Chemistry, University of Wisconsin, U.S. Archived
Brønsted–Lowry acid–base theory
Brønsted–Lowry_acid–base_theory
Surname list
States Hammett acidity function Hammett equation, based on the Hammett substituent constants sigma This page lists people with the surname Hammett. If an
Hammett
Type of oxide
carbonic acid) when dissolved. Generally non-metallic oxides are acidic. The acidity of an oxide can be reasonably assumed by its accompanying constituents
Acidic_oxide
Property of ions and molecules
affinities illustrate the role of hydration in aqueous-phase Brønsted acidity. Hydrofluoric acid is a weak acid in aqueous solution (pKa = 3.15) but
Proton_affinity
Technique for measuring a molecule's Lewis acidity
method is an experimental procedure used by chemists to assess the Lewis acidity of molecular species. Triethylphosphine oxide (Et3PO, TEPO) is used as
Gutmann–Beckett_method
Type of chemical substance
present in one formula unit of a base is also called the acidity of the base. On the basis of acidity bases can be classified into three types: monoacidic
Base_(chemistry)
Method of chemical quantitative analysis
in chemistry and biology, aiding in the determination of a solution's acidity or alkalinity through the observation of colour transitions. The table
Acid–base_titration
Autoprotolysis or exchange of a proton between two water molecules
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Self-ionization_of_water
Separation of chemical species from other acidic or basic compounds
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Acid–base_extraction
Chemical compound
speciation of [H2F]+[BF4]− (fluoronium tetrafluoroborate) and a Hammett acidity function of −16.6 at 7 mol % BF3, easily qualifying as a superacid.[page needed]
Fluoroboric_acid
Chemical catalyst
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Frustrated_Lewis_pair
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Organic_base
Oxide that shows basic properties
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Basic_oxide
Chemical reaction between an acid and a base
acids. However, Davy failed to develop a new theory, concluding that "acidity does not depend upon any particular elementary substance, but upon peculiar
Acid–base_reaction
Chemical compound formed when an acid donates a proton to a base
buffer, which prevents drastic pH changes when CO 2 is introduced. This functions as such:[citation needed] CO 2 + H 2 O ↽ − − ⇀ H 2 CO 3 ↽ − − ⇀ HCO 3
Conjugate_(acid-base_theory)
Abnormality of the human body's normal balance of acids and bases
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Acid–base_disorder
Chemical compound
as a weak base, reacting with Lewis acids to give superacids. A Hammett acidity function (H0) of −21 is obtained with antimony pentafluoride (SbF5), forming
Hydrogen_fluoride
Aqueous solution of a weak acid and its conjugate base
solution. In biological systems this is an essential condition for enzymes to function correctly. For example, in human blood a mixture of carbonic acid (H 2CO
Buffer_solution
theses compounds are quantified by the Gutmann–Beckett method, Hammett acidity function, pKa, and fluoride ion affinity (FIA). FIA is defined as the amount
Organoantimony-based Lewis acids
Organoantimony-based_Lewis_acids
Type of Lewis acid catalyst
strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Donor number Equilibrium chemistry Extraction Hammett acidity function pH
Chiral_Lewis_acid
Acid that is insoluble in the reaction medium
"31P NMR Chemical Shifts of Phosphorus Probes as Reliable and Practical Acidity Scales for Solid and Liquid Catalysts". Chemical Reviews. 117 (19): 12475–12531
Solid_acid
metal oxides. According to Hammett, the strength of a Brønsted surface site can be determined by the Hammett acidity function, H 0 = p K BH + − log [
Surface properties of transition metal oxides
Surface_properties_of_transition_metal_oxides
Measure of Lewis basicity
(2003). "Critical evaluation of stability constants and thermodynamic functions of metal complexes of crown ethers". Pure Appl. Chem. 75 (1): 71–102.
Donor_number
Process by which the human body regulates pH
action of carbonic anhydrase. When the extracellular fluids tend towards acidity, the renal tubular cells secrete the H+ ions into the tubular fluid from
Acid–base_homeostasis
Sterically hindered organic base
chemists seek the proton-removing ability of a base without any other functions. Typical non-nucleophilic bases are bulky, such that protons can attach
Non-nucleophilic_base
American chemist (1893–1978)
"superacids" and laid the foundation for the development of the Hammett acidity function. These investigations used acetic acid as the solvent and demonstrated
James_B._Conant
Base that does not dissociate completely in water
709–729. doi:10.1016/0002-9343(58)90376-0. Guide to Weak Bases from Georgetown course notes Article on Acidity of Solutions of Weak Bases from Intute
Weak_base
American chemist
Bruceton, Pennsylvania. He did research on nitric acid, discovering a new acidity function for nitration reactions. He hesitated to discuss his work on the triphenyl
Frank_Westheimer
HAMMETT ACIDITY-FUNCTION
HAMMETT ACIDITY-FUNCTION
Boy/Male
French, German
From the Little Home
Surname or Lastname
English (Devon)
English (Devon) : from a pet form of the Norman personal name Hamo (see Hammond 1).
Surname or Lastname
English
English : variant spelling of Hammett.
Boy/Male
French, German
From the Little Home
Female
English
Perhaps a form of English Edith, AIDITH means "rich battle."
Male
French
Low German form of Germanic Landebert, LAMMERT means "land-bright." In use by the Dutch and French.
Surname or Lastname
English
English : variant of Hamlett.
Boy/Male
Australian, Norse, Scandinavian
Hammer
Surname or Lastname
English and northern Irish
English and northern Irish : variant spelling of Hazlett.
Boy/Male
German
From the Little Home
Surname or Lastname
English (Gloucestershire)
English (Gloucestershire) : from the Norman personal name Hamelet, a double diminutive of the personal name Haimo (see Hammond).
Male
English
Middle English form of Old French Hamelet, HAMLET means "tiny little village."Â
Surname or Lastname
English
English : variant of Hackett 2.
Surname or Lastname
English
English : variant spelling of Hamlett.
Surname or Lastname
German, English, and Jewish (Ashkenazic)
German, English, and Jewish (Ashkenazic) : from Middle High German hamer, Yiddish hamer, a metonymic occupational name for a maker or user of hammers, for example in a forge, or nickname for a forceful person.English and German : topographic name for someone who lived in an area of flat, low-lying alluvial land beside a stream, Old English hamm, Old High German ham (see Hamm) + the English and German agent suffix -er.Norwegian : variant of Hamar.
Male
Hebrew
 Variant spelling of Hebrew Emmet, EMMETT means "truth." Compare with another form of Emmett.
Surname or Lastname
Scottish
Scottish : variant of Halkett, which is probably a habitational name from the lands of Halkhead in Renfrewshire, named with Middle English hauk, halk ‘hawk’ + wude ‘wood’.English (mainly central England) : from a pet form of the medieval personal name Hack, Hake (see Hake).English : from Middle English haket, a kind of fish, hence perhaps a nickname for someone supposed to resemble such a fish, or a metonymic occupational name for a fisherman or fish seller.Irish : when it is not the English name, this may also be an Anglicized form of Gaelic Mac Eachaidh (see Caughey, McGaffey).
Boy/Male
British, English
From the Little Home
Girl/Female
Hindu, Indian
Goddess Durga
Male
English
 Variant spelling of English Emmet, EMMETT means "entire, whole." Compare with another form of Emmett.
HAMMETT ACIDITY-FUNCTION
HAMMETT ACIDITY-FUNCTION
Boy/Male
Hindu
Boy/Male
Hindu
Lord Vishnu, Possessor of Lakshmi, Possessor of good fortune
Girl/Female
Welsh
Loved one.
Girl/Female
American, Anglo, Australian, British, Christian, English, German
Prosperous in War; Joyous; Prosperity; Rich Battle
Boy/Male
Gujarati, Hindu, Indian, Kannada, Sanskrit
Grandson of Rishi Bhrigu
Boy/Male
Hindu, Indian, Tamil
New Taste; Nine Types of Reactions
Boy/Male
Greek
Revered.
Surname or Lastname
English
English : variant of Jewett.
Boy/Male
Arabic, Muslim
Servant of the Light
Girl/Female
Muslim
Paradise
HAMMETT ACIDITY-FUNCTION
HAMMETT ACIDITY-FUNCTION
HAMMETT ACIDITY-FUNCTION
HAMMETT ACIDITY-FUNCTION
HAMMETT ACIDITY-FUNCTION
n.
Something which in firm or action resembles the common hammer
n.
Ease in performance; readiness proceeding from skill or use; dexterity; as, practice gives a wonderful facility in executing works of art.
n.
The quality or state of being valid; strength; force; especially, power to convince; justness; soundness; as, the validity of an argument or proof; the validity of an objection.
v. t.
To form or forge with a hammer; to shape by beating.
n.
The quality of being easily performed; freedom from difficulty; ease; as, the facility of an operation.
n.
Acidity; sourness.
n.
Greediness; strong appetite; eagerness; intenseness of desire; as, to eat with avidity.
n.
The quality of being agile; the power of moving the limbs quickly and easily; nimbleness; activity; quickness of motion; as, strength and agility of body.
v. i.
To be busy forming anything; to labor hard as if shaping something with a hammer.
n.
Legal strength, force, or authority; that quality of a thing which renders it supportable in law, or equity; as, the validity of a will; the validity of a contract, claim, or title.
n.
The yellow-hammer.
v. t.
To make acid; to convert into an acid; as, to acidify sugar.
n.
The quality or state of being rapid; swiftness; celerity; velocity; as, the rapidity of a current; rapidity of speech; rapidity of growth or improvement.
n.
Activity; powerful agency.
a.
Counteractive of acidity.
v. t.
To beat with a hammer; to beat with heavy blows; as, to hammer iron.
n.
The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice.
n.
The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.