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Topic: Weak base

	Weak Base
		A weak base is a chemical base that, like a weak acid, doesn't fully ionize in a water-based solution.
		The Base Ionization Constant is Kb, and indicates the strength of the base.
		The amount of base in water does not matter; the proportion of the base that ionizes is the critical number.
	www.iscid.org /encyclopedia/Weak_Base (203 words)

	Weak base - Wikipedia, the free encyclopedia
		In chemistry, a weak base is a chemical base that does not ionize fully in an aqueous solution.
		As bases are proton acceptors, a weak base may also be defined as a chemical base in which protonation is incomplete.
		A weak base is less protonated, leading to a lower pH and a lower percentage protonated.
	en.wikipedia.org /wiki/Weak_base (624 words)

	CHEMTUTOR ACIDS AND BASES
		The nitrate ion is the conjugate base of the hydrogen ion.
		The Lewis definition most clearly shows that the donor of the pair of electrons (the N atom) is a base and anything that attaches to the nitrogen by accepting a position of covalent attachment to the nitrogen is an acid.
		A buffer is made with a weak acid and a soluble salt containing the conjugate base of the weak acid or a weak base and a soluble salt containing the conjugate acid of the weak base.
	www.chemtutor.com /acid.htm (6282 words)

	Acid/Base Strength (Site not responding. Last check: )
		In order to calculate the concentration of the weak acid at equilibrium, the fact that a decrease in the concentration of the acid corresponds to an increase both in the concentration of the hydronium ions and of the conjugate base must be used.
		The conjugate acid of a weak base is a strong acid and the conjugate base of a strong acid is a weak base.
		In equation (10) where the weak base is reformed, the reaction is an example of a hydrolysis reaction.
	www.scientia.org /cadonline/Chemistry/acidbase/strength.ASP (682 words)

	ScienceDaily: Reverse mathematics (Site not responding. Last check: )
		Above that weak base theory there is a full theory (set of axioms) which is strong enough to prove the theorems one is interested in, and in which normal mathematical intuition is unimpaired.
		If the base system is chosen too weak (as an extreme case, take it to be mere predicate calculus), then the equivalence relation between theorems is overfussy: nothing is ever equivalent to anything except when it is trivially so, and we also learn nothing.
		Weak weak KÃ¶nig's lemma is the statement that a subtree of the infinite binary tee having no infinite paths has an asymptotically vanishing proportion of the leaves at length n.
	www.sciencedaily.com /encyclopedia/reverse_mathematics (4094 words)

	Aqueous acidic tin-lead immersion plating bath containing weak acid and weak base - US Patent 5334240 (Site not responding. Last check: )
		The weak base may be organic or inorganic, and preferably is a weak base such as an aqueous ammonia solution or a water-soluble organic amine whose salts are also water-soluble, such as hydrazine, ethylamine, diethylamine, triethanolamine, and the like.
		Generally, the weak acid and weak base are employed at relatively low concentrations in the bath, with the concentrations per se depending, of course, on the particular weak acid and weak base employed, and the concentrations of other components in the bath.
		It is theorized that the weak acid and weak base bring about a buffering action which controls the pH of the bath and enables the bath to be stable and to be capable of co-deposition of tin and lead in desired weight ratios.
	www.patentstorm.us /patents/5334240.html (2338 words)

	Chemistry: Acids and Bases
		This is because the conjugate base of a strong acid is very weak and cannot undergo hydrolysis.
		An acid-base titration is when you add a base to an acid until the equivalence point is reached which is where the moles of acid equals the moles of base.
		For the titration of a strong base with a weak acid, the equivalence point is reached when the pH is greater than seven (7).
	www.shodor.org /unchem/basic/ab (1233 words)

	Insoluble resin-metal compound complex prepared by contacting weak base ion exchange resin with solution of ...
		The weak base anion exchange resin is a resin, exemplified by a styrene-divinylbenzene copolymer, having attached thereto a non-ionic functional group or ligand exemplified by a primary amine.
		The weak base anion exchange resin is not in itself an anion exchange resin since it does not have attached thereto an ionic functional group or ligand.
		The solution of the soluble coordination compound and the insoluble weak base anion exchange resin are contacted at a temperature and for a time to effect bonding of a desired amount of the coordination compound to the resin.
	www.freepatentsonline.com /4111856.html (7963 words)

	Chapter 15 Review
		A weak acid partially dissociates in water to produce hydronium ions and a conjugate base.
		Weak bases such as ammonia accept a proton from water to give the conjugate acid of the base and OH ions.
		Salts from a weak-base–strong-acid neutralization are acidic because the cation is a weak acid.
	www.msu.edu /~serordan/chap.15.htm (790 words)

	Chemical Sciences: Acidity of Solutions Considering Acid-Base Reactions
		This has to be the case for, if the resultant acid or base were stronger, it would promptly donate the proton to (or, in the case of the base, acquire the proton from) the species which originally did (or, in the case of the base, did not) possess it.
		A strong acid reacts with a weak base to yield the weak acid which is the conjugate acid of the weak base.
		Likewise, a strong base reacts with a weak acid to yield the weak base which is the conjugate base of the weak acid.
	www.psigate.ac.uk /newsite/reference/plambeck/chem1/p01161.htm (1170 words)

	The Past-Tense Verb in the Noldorin of the Etymologies
		The weak past tense, which class includes chiefly verbs arising from derived verb-stems (that is, verb-stems formed from a root by suffixion of some derivational element, such as ‑ā, ‑tā, ‑yā, etc.), is characterized by the lack of root syllable strengthening and the suffixion of some past-tense marker, very often ‑nē.
		These two main classes are neatly exemplified by the two Qenya past-tense verbs arising from the base ONO- beget in Etymologies, óne (strong) and ontane (weak), the former arising directly from the base and the latter from the derived stem onta-.
		It is noteworthy, too, that the cognate noun corresponding to dravo, EN dramb, dram(m) a heavy stroke, a blow, shows derivation from the base by an apparent suffix *‑bā, with an initial stop; perhaps the stop of this form influenced this formation as well.
	www.elvish.org /Tengwestie/articles/Hostetter/noldpat.phtml (3272 words)

	Learn Essays about Weak Acid Strong Base and Weak Base Strong Acid Titrations
		Weak Acid Strong Base and Weak Base Strong Acid Titrations
		According to the Bronsted-Lowry theory, the strength of an acid is inversely related to the strength of its conjugate base.
		1079 M of weak acetic acid was titrated with potent sodium hydroxide (NaOH) using a pH meter.
	www.learnessays.com /show_essay/109237.html (282 words)

	Process for removing the salt of a weak acid and a weak base from solution - Patent 4029744
		By selection of the reactant present in the interior phase of the emulsion, the process of the instant invention may be designed to remove either the weak acid or the weak base in the interior phase of the emulsion.
		Furthermore, in both cases it is apparent that the nonvolatile acid or base which is utilized to remove the volatile acid or base from solution is necessarily left behind and would cause further problems in that the nonvolatile acid or base is a contaminant of the aqueous solution and may have to be separated therefrom.
		In the case of the preferred embodiment wherein the solution containing the above described salt of a weak acid and a weak base is aqueous, the exterior phase of the emulsion may be conveniently prepared by utilizing a hydrocarbon as the exterior phase.
	www.freepatentsonline.com /4029744.html (5096 words)

	CHEMISTRY 106 (Site not responding. Last check: )
		Strong bases are hydroxides of Groups 1A and 2A that dissociate completely in water.
		In water, weak acids and weak bases produce only a few ions when equilibrium is reached.
		A salt of a weak base contains an ion that donates a proton to water producing an acidic solution.
	learn.sdstate.edu /douglas_raynie/chem106/StudyGuide10.htm (497 words)

	Buffer Preparation (Haverford College Gen Chem)
		Dissolve the weak acid and weak base together in the desired volume of deionized water.
		This method is preferred over #2a when the buffer involves a neutral weak base and a cationic conjugate acid (which applies to amines and imines such as ammonia, TRIS and imidazole).
		In a beaker or large bottle, add deionized water to the weak base until you reach about 90% of the desired final volume.
	www.haverford.edu /chem/Scarrow/GenChem/acidbase/buffer_prep.html (739 words)

	CHM 1046 (Site not responding. Last check: )
		Weak bases in water react to release a hydroxide (OH) ion and their conjugate acid:
		Recall that for weak acids, the atom that the hydrogen is bonded to should have a high electronegativity value that promotes "taking" the shared electrons in the bond with hydrogen.
		However, this may be quite small compared to the concentration produced by the ionization of the weak base, so we will ignore it.
	wine1.sb.fsu.edu /chm1046/notes/AcidBase/WeakBase/WeakBase.htm (700 words)

	Nuffield Advanced Chemistry - Is calcium hydroxide a strong or a weak base?
		Weak bases mirror this behaviour: their molecules have only a very slight tendency to accept protons from water molecules and produce OH ions.
		Yes, I think I would regard it as a weak base because its low solubility means it produces a low concentration of OH ions in solution.
		The Arrhenius theory defines bases as substances which produce OH ions in aqueous solution; the greater the OH concentration, the stronger the base.
	www.chemistry-react.org /go/Tutorial/Tutorial_4623.html (626 words)

	Chemical Sciences: Acidity of Solutions of Weak Bases
		An aqueous solution of a weak base is treated by the same methods as used for aqueous solutions of weak acids.
		As the strength of the acid or base increases, however, the assumption that essentially all of it is present in the unionized form begins to become less realistic as the following example shows.
		On the basis of the examples considered above, we may conclude that in solutions which contain a weak acid or weak base neglect of the ionization of water and the ionization of the weak acid or base is reasonable almost all of the time.
	www.psigate.ac.uk /newsite/reference/plambeck/chem1/p01154.htm (825 words)

	SparkNotes: Titrations: Acid-Base Titrations
		An indicator is an acid or base whose conjugate acid or conjugate base has a color different from that of the original compound.
		and concentration of the conjugate base of the weak acid.
		The titration of a base with an acid produces a flipped-over version of the titration curve of an acid with a base.
	www.sparknotes.com /chemistry/acidsbases/titrations/section1.html (717 words)

	Acid Strength
		The bond strengths of acids and bases are implied by the relative amounts of molecules and ions present in solution.
		Weak acids exist mostly as molecules with only a few ions in solution, therefore the bonds holding H and A together must be strong.
		Acids or bases with weak bonds easily dissociate into ions and are called "strong" acids or bases.
	www.elmhurst.edu /~chm/vchembook/185strength.html (404 words)

	Chemistry 104 Study Groups--Buffers and Titrations
		COOH and CH) or a weak base and its conjugate acid (i.e.
		The concentration of both the weak acid and weak base must be considered.
		The pH of a buffer after addition of a strong base requires consideration of the stoichiometry of the reaction (conversion of weak acid to weak base) and the equilibrium in the same manner as for the addition of a strong acid.
	www.brynmawr.edu /Acads/Chem/Chem104lc/study/Buffers.html (835 words)

	[No title]
		Buffers are either solutions of a weak acid and its conjugate base or a weak base and its conjugate acid.
		Typically the ratio of acid and conjugate base or base and conjugate acid is close to 1 (between 0.1 and 10).
		The term for an ion that reacts with water to generate the conjugate acid and hydroxide or the conjugate base and hydronium is hydrolysis.
	www.seattlecentral.org /faculty/dwick/AcidBase211.doc (1125 words)

	acid/base.htm
		Buffer solutions consist of a weak acid and its conjugate base (acidic buffer) or a weak base and its conjugate acid (alkaline buffer).
		In this case the concentrations of the weak acid and its conjugate base are known to the 10
		Notice that the concentrations of both the weak base and conjugate acid are known.
	pages.towson.edu /ladon/eqab.html (2508 words)

	acid/base.htm
		Buffer solutions consist of a weak acid and its conjugate base (acidic buffer) or a weak base and its conjugate acid (alkaline buffer).
		In this case the concentrations of the weak acid and its conjugate base are known to the 10
		Notice that the concentrations of both the weak base and conjugate acid are known.
	www.towson.edu /~ladon/eqab.html (2508 words)

	Acid-Base Reactions
		It is the easiest to discuss because both the acid and base are totally ionized in solution and we don't have an equilibrium reaction.
		The base will now be assumed to be 100% ionized so we only have to be concerned with the equilibrium reaction of the weak acid.
		We can then determine for particular weak acids and weak bases if the resultant equilibrium constant is large enough so that the reaction proceeds mostly to the right.
	erkki.kennesaw.edu /GCII7/gc00001.htm (1145 words)

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