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searching for Weak base 101 found (142 total)

alternate case: weak base

Thallium(III) hydroxide (229 words) [view diff] exact match in snippet view article

hydroxide of thallium. It is a white solid. Thallium(III) hydroxide is a very weak base; it dissociates to give the thallium(III) ion, Tl3+, only in strongly

Pyrazole (1,004 words) [view diff] exact match in snippet view article find links to article

adjacent nitrogen atoms, which are in ortho-substitution. Pyrazole is a weak base, with pKb 11.5 (pKa of the conjugate acid 2.49 at 25 °C). Pyrazoles are

Propylamine (95 words) [view diff] exact match in snippet view article find links to article

formula CH3(CH2)2NH2. It is a colorless volatile liquid. Propylamine is a weak base. Its Kb (base dissociation constant) is 4.7 × 10−4. Propyl amine hydrochloride

Oxazole (616 words) [view diff] exact match in snippet view article find links to article

Oxazoles are aromatic compounds but less so than the thiazoles. Oxazole is a weak base; its conjugate acid has a pKa of 0.8, compared to 7 for imidazole. The

Beretta M1918 (745 words) [view diff] exact match in snippet view article find links to article

over-powder wad, designed to improve the penetration abilities of the weak base cartridge. Barrel rifling: 6 grooves with a right hand twist (6-right)

Diphenyl oxalate (225 words) [view diff] exact match in snippet view article find links to article

pH dependent, and slightly alkaline conditions, achieved by adding a weak base, such as sodium salicylate, give a faster reaction and therefore produce

E1cB-elimination reaction (2,146 words) [view diff] exact match in snippet view article find links to article

carbon becomes much more acidic, allowing it to then be removed by the weak base in the second step. In an E2 reaction, the presence of a strong base and

Bill McInturff (291 words) [view diff] exact match in snippet view article find links to article

healthcare law: The way our brains work, if you're starting at a very weak base, it's easier to hear negative information that reinforces what you believe

Sen Katayama (754 words) [view diff] exact match in snippet view article find links to article

socialist community, and after 1920, the communist community. Katayama had a weak base inside Japan, and was little known there. However, in the rest of the

Quick bread (1,417 words) [view diff] exact match in snippet view article find links to article

process, agents (one or more food-grade chemicals—usually a weak acid and a weak base) are added into the dough during mixing. These agents undergo a chemical

Bis(2,4,5-trichloro-6-(pentyloxycarbonyl)phenyl)oxalate (261 words) [view diff] exact match in snippet view article

is pH dependent, and slightly alkaline conditions achieved by adding a weak base, e.g. sodium salicylate, will produce brighter light. Developed by American

Triethyl phosphonoacetate (113 words) [view diff] exact match in snippet view article find links to article

phosphonate anion. It has an acidic proton that can easily be abstracted by a weak base. When used in an HWE reaction with a carbonyl the resulting alkene formed

Neutralization (chemistry) (2,133 words) [view diff] exact match in snippet view article

color at low pH. When a weak acid reacts with an equivalent amount of a weak base, HA + B ⇌ A− + BH+ complete neutralization does not always occur. The

Ferrate(VI) (734 words) [view diff] exact match in snippet view article

water-stable oxidizing species known. Although it is classified as a weak base, concentrated solutions containing ferrate(VI) are corrosive and attack

Hydroxychloroquine (4,806 words) [view diff] exact match in snippet view article find links to article

increases lysosomal pH in antigen-presenting cells by two mechanisms: As a weak base, it is a proton acceptor and via this chemical interaction, its accumulation

Merox (1,723 words) [view diff] exact match in snippet view article find links to article

versions of the process, the alkalinity is provided by ammonia, which is a weak base. The catalyst in some versions of the process is a water-soluble liquid

9mm Glisenti (346 words) [view diff] exact match in snippet view article find links to article

over-powder wad, designed to improve the penetration abilities of the weak base cartridge. The Medusa M47 revolver can also fire 9mm Glisenti ammunition

AdaBoost (4,886 words) [view diff] exact match in snippet view article find links to article

converge to a strong learner. Although AdaBoost is typically used to combine weak base learners (such as decision stumps), it has been shown that it can also

Lead(II) hydroxide (442 words) [view diff] exact match in snippet view article

Chevrel phases. In aqueous solution, lead(II) hydroxide is a somewhat weak base, forming lead(II) ion, Pb2+, under weakly acidic conditions. This cation

Titration (4,669 words) [view diff] exact match in snippet view article find links to article

bromothymol blue being most appropriate. Titrations between a weak acid and a weak base have titration curves which are very irregular. Because of this, no definite

Selenium tetrafluoride (534 words) [view diff] exact match in snippet view article find links to article

also has a distorted octahedral environment. In HF, SeF4 behaves as a weak base, weaker than sulfur tetrafluoride, SF4 (Kb= 2 X 10−2): SeF4 + HF → SeF3+

Ammonium acetate (627 words) [view diff] exact match in snippet view article find links to article

+ H2O It is also used as a diuretic. As the salt of a weak acid and a weak base, ammonium acetate is often used with acetic acid to create a buffer solution

Cinnamic acid (687 words) [view diff] exact match in snippet view article find links to article

reactants for this are benzaldehyde and malonic acid in the presence of a weak base, followed by acid-catalyzed decarboxylation. It can also be prepared by

Dimethylamine (843 words) [view diff] exact match in snippet view article find links to article

atom with two methyl substituents and one hydrogen. Dimethylamine is a weak base and the pKa of the ammonium CH3-NH+ 2-CH3 is 10.73, a value above methylamine

Strontium carbonate (698 words) [view diff] exact match in snippet view article find links to article

carbonate is a white, odorless, tasteless powder. Being a carbonate, it is a weak base and therefore is reactive with acids. It is otherwise stable and safe

Sodium tellurite (528 words) [view diff] exact match in snippet view article find links to article

86 Å and the O-Te-O angle is close to 99.5°. The tellurite anion is a weak base. Sodium tellurite would be similar to sodium selenite and sodium sulfite

Elimination reaction (1,843 words) [view diff] exact match in snippet view article find links to article

usually occurs in the complete absence of a base or the presence of only a weak base (acidic conditions and high temperature). E1 reactions are in competition

Triphenylphosphine (1,624 words) [view diff] exact match in snippet view article find links to article

2 Ph3PCl2 + NH2OH·HCl + Ph3P → {[Ph3P]2N}Cl + 4HCl + Ph3PO PPh3 is a weak base (aqueous pKaH = 2.73, determined electrochemically), although it is a

Electrophilic aromatic substitution (2,089 words) [view diff] exact match in snippet view article find links to article

donate the proton attached to the sp3 carbon to the solvent (or any other weak base) to reestablish aromaticity. The net result is the replacement of H by

Ethanolamine (1,339 words) [view diff] exact match in snippet view article find links to article

recycled through a regeneration unit. When heated, MEA, being a rather weak base, will release dissolved H2S or CO2 gas resulting in a pure MEA solution

Isoquinoline (1,037 words) [view diff] exact match in snippet view article find links to article

protonated derivative. Being an analog of pyridine, isoquinoline is a weak base, with a pKa of 5.14. It protonates to form salts upon treatment with strong

Ammonium sulfate (1,775 words) [view diff] exact match in snippet view article find links to article

nitrogen, sulfur dioxide, and water. As a salt of a strong acid (H2SO4) and weak base (NH3), its solution is acidic; the pH of 0.1 M solution is 5.5. In aqueous

Hydrogen fluoride (1,366 words) [view diff] exact match in snippet view article find links to article

an extremely acidic liquid (H0 = −15.1). Like water, HF can act as a weak base, reacting with Lewis acids to give superacids. A Hammett acidity function

Saponification value (1,445 words) [view diff] exact match in snippet view article find links to article

which indicates the consumption of strong base (KOH) by the acid, not the weak base (potassium carboxylates). The SV (mg KOH/ g of sample) is calculated as

Ammonium (2,081 words) [view diff] exact match in snippet view article find links to article

communities that depend on it. The ammonium ion is generated when ammonia, a weak base, reacts with Brønsted acids (proton donors): H+ + NH3 → [NH4]+ The ammonium

Vesicular monoamine transporter (4,993 words) [view diff] exact match in snippet view article find links to article

methamphetamine decrease dopamine uptake because of the weak base properties of substituted amphetamines. This “Weak Base Hypothesis” proposes that amphetamine analogs

Sodium fluoride (2,010 words) [view diff] exact match in snippet view article find links to article

dimethylformamide Vapor pressure 1 mmHg @ 1077 °C Acidity (pKa) 3,20 (weak base, see HF) Magnetic susceptibility (χ) −16.4·10−6 cm3/mol Refractive index

TCPO (224 words) [view diff] exact match in snippet view article find links to article

10-bis(phenylethynyl)anthracene, a solvent (such as diethyl phthalate), and a weak base (usually sodium acetate or sodium salicylate), and hydrogen peroxide,

CS gas (1,956 words) [view diff] exact match in snippet view article find links to article

ClC6H4CHO + H2C(CN)2 → ClC6H4CHC(CN)2 + H2O The reaction is catalysed with a weak base like piperidine or pyridine. The production method has not changed since

Diazo (1,342 words) [view diff] exact match in snippet view article find links to article

transfer certain carbon acids react with tosyl azide in the presence of a weak base like triethylamine or DBU. The byproduct is the corresponding tosylamide

Lisdexamfetamine (10,355 words) [view diff] exact match in snippet view article find links to article

from the gut, and bioavailability is typically 90%. Amphetamine is a weak base with a pKa of 9.9; consequently, when the pH is basic, more of the drug

Alkali soil (3,229 words) [view diff] exact match in snippet view article find links to article

dissociates in: Na 2CO 3 → 2 Na+ + CO2− 3 The carbonate anion CO2− 3, is a weak base accepting a proton, so it hydrolyses in water to give the bicarbonate

Enolate (2,487 words) [view diff] exact match in snippet view article find links to article

use of strong bases, enolates can be generated using a Lewis acid and a weak base ("soft conditions"): For deprotonation to occur, the stereoelectronic

Michael addition reaction (2,825 words) [view diff] exact match in snippet view article find links to article

deprotonated with a strong base (hard enolization) or with a Lewis acid and a weak base (soft enolization). The resulting enolate attacks the activated olefin

Ion exchange (2,197 words) [view diff] exact match in snippet view article find links to article

Lower chemical stability than Type 1 but better regeneration efficiency. Weak base (WBA): Act as acid absorbers; capable of sorbing strong acids with a high

Mr Muscle (927 words) [view diff] exact match in snippet view article find links to article

monoethanolamine had similar properties.[citation needed] Monoethanolamine is a weak base, so it required the addition of caustic soda as well as surfactants and

Silyl enol ether (1,369 words) [view diff] exact match in snippet view article find links to article

bond) preferentially forms due to sterics. When using triethylamine, a weak base, the thermodynamic silyl enol ether (with a more substituted double bond)

Conductometry (763 words) [view diff] exact match in snippet view article find links to article

determine the equivalence point. For reaction between a weak acid and a weak base in the beginning conductivity decreases a bit as the few available H+

High-valent iron (1,431 words) [view diff] exact match in snippet view article find links to article

water-stable oxidising species known. Although it is classified as a weak base, concentrated solutions of ferrate(VI) are only stable at high pH. The

Pyrrole (3,142 words) [view diff] exact match in snippet view article find links to article

chemical shifts at 6.68 (H2, H5) and 6.22 (H3, H4). Pyrrole is an extremely weak base for an amine, with a conjugate acid pKa of −3.8. The most thermodynamically

Leveling effect (644 words) [view diff] exact match in snippet view article find links to article

a stronger acid in NH3, a weak acid in CH3COOH, neutral in C6H6 and a weak base in HF. Atkins, P.W. (2010). Shriver and Atkins' Inorganic Chemistry, Fifth

Villar Perosa aircraft submachine gun (2,419 words) [view diff] exact match in snippet view article find links to article

over-powder wad, designed to improve the penetration abilities of the weak base cartridge. The original patent was filed in April 1914 by Abiel Bethel

Aniline (4,068 words) [view diff] exact match in snippet view article find links to article

is the precursor to 4,4'-MDI and related diisocyanates. Aniline is a weak base. Aromatic amines such as aniline are, in general, much weaker bases than

1,2,3-Benzothiadiazole (594 words) [view diff] exact match in snippet view article find links to article

already having additional substituents. 1,2,3-benzothiadiazole is a very weak base and alkylation reactions give exclusively the 3-amino quaternary salt

Azobenzene (1,873 words) [view diff] exact match in snippet view article find links to article

isomerization in the ground state is approximately 100 kJ/mol. Azobenzene is a weak base, but undergoes protonation at one nitrogen with a pKa = -2.95. It functions

Second-order arithmetic (3,848 words) [view diff] exact match in snippet view article find links to article

sets, Π 3 1 {\displaystyle \Pi _{3}^{1}} uniformization, etc. Over a weak base theory (such as RCA0), projective determinacy implies comprehension and

Adderall (19,815 words) [view diff] exact match in snippet view article find links to article

from the gut, and bioavailability is typically 90%. Amphetamine is a weak base with a pKa of 9.9; consequently, when the pH is basic, more of the drug

Amphetamine (25,282 words) [view diff] exact match in snippet view article find links to article

from the gut, and bioavailability is typically 90%. Amphetamine is a weak base with a pKa of 9.9; consequently, when the pH is basic, more of the drug

Phenoxyacetic acid (413 words) [view diff] exact match in snippet view article find links to article

ethanol, diethyl ether and benzene. Phenoxyacetic acid is a weak acid and weak base with a pKa of 3.7. Phenoxyacetic acid has found minor uses as a food additive

Piperazine (1,618 words) [view diff] exact match in snippet view article find links to article

in water and ethylene glycol, but insoluble in diethyl ether. It is a weak base with two pKb of 5.35 and 9.73 at 25 °C.; the pH of a 10% aqueous solution

Ion trapping (677 words) [view diff] exact match in snippet view article find links to article

alkaline. Similarly, ingesting sodium bicarbonate with amphetamine, a weak base, causes better absorption of amphetamine (in stomach) and its lesser excretion

Nitrogen (12,188 words) [view diff] exact match in snippet view article find links to article

presence of only one lone pair in NH3 rather than two in H2O. It is a weak base in aqueous solution (pKb 4.74); its conjugate acid is ammonium, NH+ 4

Dextroamphetamine (18,936 words) [view diff] exact match in snippet view article find links to article

from the gut, and bioavailability is typically 90%. Amphetamine is a weak base with a pKa of 9.9; consequently, when the pH is basic, more of the drug

Cocaine (17,679 words) [view diff] exact match in snippet view article find links to article

Onset of absorption after oral ingestion is delayed because cocaine is a weak base with a pKa of 8.6, and is thus in an ionized form that is poorly absorbed

Methylphenidate (12,719 words) [view diff] exact match in snippet view article find links to article

vesicle. ... Amphetamine and its derivatives like methamphetamine are weak base compounds that are the only widely used class of drugs known to elicit

Fentanyl (16,047 words) [view diff] exact match in snippet view article find links to article

complex versions of this structure. Like other opioids, fentanyl is a weak base that is highly lipid-soluble, protein-bound, and protonated at physiological

Coral (12,210 words) [view diff] exact match in snippet view article find links to article

classical times ingestion of pulverized coral, which consists mainly of the weak base calcium carbonate, was recommended for calming stomach ulcers by Galen

Fullerene chemistry (4,408 words) [view diff] exact match in snippet view article find links to article

of polycyclic aromatic hydrocarbons. C60 reacts with Li[BHEt3] to the weak base [HC60]−, which is isolated as Li[HC60][H2O]6-9. Fullerenes can react with

Boron (12,763 words) [view diff] no match in snippet view article find links to article

Fujii Y, Okamoto M (1986). "Chromatographic Enrichment of 10B by Using Weak-Base Anion-Exchange Resin". Separation Science and Technology. 21 (6): 643–654

Sun Yat-sen (12,432 words) [view diff] exact match in snippet view article find links to article

after World War II. He focused on China, with its vast potential and weak base of mostly local entrepreneurs. His key proposal was socialism. He proposed:

Dopamine transporter (4,635 words) [view diff] exact match in snippet view article find links to article

vesicle. ... Amphetamine and its derivatives like methamphetamine are weak base compounds that are the only widely used class of drugs known to elicit

Properties of water (9,563 words) [view diff] exact match in snippet view article find links to article

+ H 2O (Lewis acid) → Cl(H 2O)− 6 When a salt of a weak acid or of a weak base is dissolved in water, water can partially hydrolyze the salt, producing

Federalist Party (10,660 words) [view diff] exact match in snippet view article find links to article

Democratic-Republican Party leader in Congress during the 1810s. The Federalists had a weak base in the South, with their main base in the Northeast and especially New

Simón Bolívar (14,642 words) [view diff] exact match in snippet view article find links to article

declaration of independence created the first Republic of Venezuela. It had a weak base of support and enemies in conservative whites, disenfranchised people

Morphine (13,643 words) [view diff] exact match in snippet view article find links to article

are acidic.[citation needed] Since they derive from a strong acid but weak base, they are both at about pH = 5;[clarification needed][citation needed]

China–France relations (4,531 words) [view diff] exact match in snippet view article find links to article

Soviet Union in the Sino-Soviet split and China had therefore a very weak base of support inside France, apart from some militant students. After the

Wolff rearrangement (4,578 words) [view diff] exact match in snippet view article find links to article

is also common. These reactions are generally run in the presence of a weak base, such as sodium carbonate or tertiary amines. Whereas thermal and metal

Fischer carbene (1,435 words) [view diff] exact match in snippet view article find links to article

carbene bears an α-proton, it could be reversibly deprotonated with a weak base such as pyridine. This facilitates formation of chromium hydride species

Diphenylamine (2,334 words) [view diff] exact match in snippet view article find links to article

of aniline over oxide catalysts: 2 C6H5NH2 → (C6H5)2NH + NH3 It is a weak base, with a Kb of 10−14. With strong acids, it forms salts. For example, treatment

Intracellular pH (1,891 words) [view diff] exact match in snippet view article find links to article

a phosphate buffer, substantial quantities of weak acid and conjugate weak base (H2PO4– and HPO42–) can accept or donate protons accordingly in order

Sodium trifluoroacetate (296 words) [view diff] exact match in snippet view article find links to article

23 for trifluoroacetic acid, the trifluoroacetate ion is an extremely weak base compared to acetic acid, which has a pKa of 4.76. This is due to the

Pitting corrosion (3,947 words) [view diff] exact match in snippet view article find links to article

than that of chloride ions because they are twice negatively charged (weak base reluctant to accept a proton). In capillary electrophoresis, thiosulfate

Brooker's merocyanine (762 words) [view diff] exact match in snippet view article find links to article

Synthesis of Brooker's merocyanine from 4-methylpyridine, methyl iodide, and 4-hydroxybenzaldehyde. Step 2 is catalyzed by weak base.

Francis Schaeffer (4,781 words) [view diff] exact match in snippet view article find links to article

Schaeffer argues that the humanist base for morals is fundamentally a weak base upon which to build a moral framework for society. By contrast, the Bible

TAAR1 (6,646 words) [view diff] exact match in snippet view article find links to article

vesicle. ... Amphetamine and its derivatives like methamphetamine are weak base compounds that are the only widely used class of drugs known to elicit

William Lyon Mackenzie King (14,704 words) [view diff] exact match in snippet view article find links to article

when King returned to politics in 1919, he was a rusty outsider with a weak base facing a nation bitterly split by language, regionalism and class. He

Furoquinoline alkaloid (792 words) [view diff] exact match in snippet view article find links to article

activity. Thomas first isolated dictamnine from Rutaceae in 1923. It is very weak base, shows similar reaction with methyl iodide and dimethyl sulfate or diazomethane

Bafilomycin (4,307 words) [view diff] exact match in snippet view article find links to article

environment of the lysosome results in ion trapping, or accumulation of the weak base in the lysosome. Bafilomycin inhibits this trapping through its action

Nonmetal (18,838 words) [view diff] exact match in snippet view article find links to article

amphoteric its very weak acid properties dominate over those of a very weak base. Johnson counted boron as a nonmetal and silicon, germanium, arsenic,

Peter O'Neill (7,901 words) [view diff] exact match in snippet view article find links to article

end of the previous parliament. He needed to form a coalition from a weak base in a fragmented parliament. O'Neill succeeded again in doing that: he

Teruaki Mukaiyama (2,170 words) [view diff] exact match in snippet view article find links to article

concept of the redox condensation reaction, in which a weak acid and weak base catalyze a condensation by means of a redox reaction – this would become

2020 Hawaii Rainbow Warriors football team (1,731 words) [view diff] case mismatch in snippet view article find links to article

WEAK BASE STRONG Jeremiah Pritchard Darius Muasau Khoury Bethley Isaiah Tufaga Penei Pavihi Logan Taylor

David Sulzer (5,063 words) [view diff] exact match in snippet view article find links to article

releases the same transmitter from each of its synapses. By introducing the "weak base hypothesis" of amphetamine action, for measuring amphetamine's effects

Induction, bounding and least number principles (1,211 words) [view diff] exact match in snippet view article find links to article

{M}}} . The following relations hold between the principles (over the weak base theory P A − + I Σ 0 {\displaystyle {\mathsf {PA}}^{-}+{\mathsf {I}}\Sigma

Oligonucleotide synthesis (9,462 words) [view diff] exact match in snippet view article find links to article

the support-bound material with iodine and water in the presence of a weak base (pyridine, lutidine, or collidine) oxidizes the phosphite triester into

Azobenzene dioxide (168 words) [view diff] exact match in snippet view article find links to article

deeply blue nitrosobenzene: (C6H5N(O))2 → 2 C6H5NO Azobenzene dioxide is a weak base, forming coordination complexes such as [Co[(C6H5N(O))2]4]2+. Dieterich

Histamine liberators (2,249 words) [view diff] exact match in snippet view article find links to article

chemical makeup to be the basis of its own liberation. Histamine is a weak base (a compound able to react with a hydrogen ion to form an acid) that can

Nitrogen compounds (4,298 words) [view diff] exact match in snippet view article find links to article

presence of only one lone pair in NH3 rather than two in H2O. It is a weak base in aqueous solution (pKb 4.74); its conjugate acid is ammonium, NH+ 4

Gran plot (4,850 words) [view diff] exact match in snippet view article find links to article

(0.5% error). Similar equations can be written for the titration of a weak base by strong acid (Gran, 1952; Harris, 1998). Martell and Motekaitis (1992)

S2S (mathematics) (4,618 words) [view diff] exact match in snippet view article

while the rest (in terms of proving S2S sentences) can be done in a weak base theory. Conversely, RCA0+S2S gives us a determinacy schema that gives

January–March 2023 in science (28,844 words) [view diff] exact match in snippet view article find links to article

sequestration of CO2: Dramatic effect of coordinated Cu(II) onto a chelating weak base ion exchanger". Science Advances. Vol. 9, no. 10. doi:10.1126/sciadv.adg1956