Difference Between Alkali and Base
3
Home / Science & Nature / Science / Chemistry / Difference Between Alkali and Base Difference Between Alkali and Base Posted on October 15, 2011 by admin Alkali vs Base The word alkali is often used interchangeably to address highly basic solutions and alkali metals. In this context, alkali is referred to the alkali metals. Base Bases are defined in several ways by various scientists. Arrhenius defines a base as a substance that donates OH ions to the solution. Bronsted Lowry defines a base as a substance that can accept a proton. According to Lewis, any electron donor is a base. According to the Arrhenius definition, a compound should have a hydroxide anion and the ability to donate it as a hydroxide ion to be a base. However, according to Lewis and Bronsted Lowry, there can be molecules, which don’t possess hydroxides, but can act as a base. For example, NH is a Lewis base, because it can donate the electron pair on nitrogen. Na CO is a Bronsted Lowry base without hydroxide groups, but has the ability to accept hydrogens. Bases have a slippery soap like feeling and a bitter taste. They react easily with acids producing water and salt molecules. Caustic soda, ammonia, and baking soda are some of the common bases we come across very often. Bases can be categorized into two, based on their ability to dissociate and produce hydroxide ions. Strong bases like NaOH, KOH, are completely ionized in a solution, to give ions. Weak bases like NH partially dissociate and give fewer amounts of hydroxide ions. K is the base dissociation constant. It gives an indication of the ability to lose hydroxide ions of a weak base. Acids with a higher pK value (more than 13) are weak acids, but their conjugate bases are considered as strong bases. To check whether a substance is a base or not we can use several indicators like litmus paper or pH paper. Bases show a pH value higher than 7, and it turns red litmus to blue. Alkali HOME VACANCIES ABOUT CONTACT US TECHNOLOGY SCIENCE & NATURE PUBLIC PEOPLE LIFE STYLE LANGUAGE HEALTH EDUCATION COUNTRIES BUSINESS AUTOMOBILE 3 2 3 3 b a
-
Upload
anurag-yadav -
Category
Documents
-
view
3 -
download
1
description
ass
Transcript of Difference Between Alkali and Base
-
Home/Science&Nature/Science/Chemistry/DifferenceBetweenAlkaliandBase
DifferenceBetweenAlkaliandBasePostedonOctober15,2011byadmin
AlkalivsBaseThe word alkali is often used interchangeably toaddresshighlybasicsolutionsandalkalimetals.Inthiscontext,alkaliisreferredtothealkalimetals.
Base
Basesaredefinedinseveralwaysbyvariousscientists.Arrheniusdefinesabaseasasubstance thatdonatesOH ions to the solution. Bronsted Lowry defines a
baseasa substance that canacceptaproton.According toLewis, anyelectrondonor isabase.AccordingtotheArrheniusdefinition,acompoundshouldhaveahydroxideanionandtheabilitytodonateitasahydroxideiontobeabase.However,accordingtoLewisandBronstedLowry,therecanbemolecules,whichdontpossesshydroxides,butcanactasabase.Forexample,NH isaLewisbase,becauseitcandonatetheelectronpaironnitrogen.Na CO isaBronstedLowrybasewithouthydroxidegroups,buthastheabilitytoaccepthydrogens.
Bases have a slippery soap like feeling and a bitter taste. They react easilywith acids producingwaterandsaltmolecules.Causticsoda,ammonia,andbakingsodaaresomeofthecommonbaseswecomeacrossveryoften.Basescanbecategorized into two,basedontheirability todissociateandproducehydroxideions.StrongbaseslikeNaOH,KOH,arecompletelyionizedinasolution,togiveions.WeakbaseslikeNH partiallydissociateandgivefeweramountsofhydroxideions.K isthebasedissociationconstant. Itgivesan indicationof theability to losehydroxide ionsofaweakbase.AcidswithahigherpK value (more than13)areweakacids,but theirconjugatebasesareconsidered as strong bases. To checkwhether a substance is a base or notwe can use severalindicatorslikelitmuspaperorpHpaper.BasesshowapHvaluehigherthan7,anditturnsredlitmustoblue.
Alkali
HOME VACANCIES ABOUT CONTACTUS
TECHNOLOGY SCIENCE&NATURE PUBLIC PEOPLE LIFESTYLE LANGUAGE HEALTH EDUCATION COUNTRIES
BUSINESS AUTOMOBILE
3
2 3
3 b
a
-
Alkali isa termcommonlyused for themetals in thegroup1of theperiodic table.Thesearealsoknownasalkalimetals.AlthoughHisalsoincludedinthisgroup,itissomewhatdifferent.Therefore,lithium (Li), sodium (Na), potassium (K), Rubidium (Rb), Cesium (Cs) and Francium (Fr) aremembers of this group. Alkalimetals are soft, shiny, silvery colormetals. They all have only oneelectronintheiroutershell,andtheyliketoremovethisandform+1cations.Whentheoutermostelectronsareexcited,itcomesbacktothegroundstatewhileemittingradiationinthevisiblerange.Theemissionof thiselectron iseasy thus,alkalimetalsareveryreactive.Thereactivity increasesdown the column. They form ionic compoundswith other electronegative atoms.More accurately,alkaliisreferredtothecarbonateorthehydroxideofanalkalimetal.Theyalsohavebasicproperties.Theyarebitterintaste,slippery,andreactwithacids,tomakethemneutralized.
Whatisthedifferencebetweenbaseandalkali?
Group1metalsarereferredasalkali,ormoreaccurately,theircarbonates
andhydroxidesarereferredasalkali.However,theyhavebasicproperties,
thusisasubsetofbases.
Soallalkalisarebases,butnotallbasesarealkalis.
Alkaliisanionicsalt,whereasbasesarenecessarilynotso.
Relatedposts:
1. DifferenceBetweenBaseandNucleophile2. DifferenceBetweenAcidandBase3. DifferenceBetweenAcidandAlkaline4. DifferenceBetweenBaseRateandBPLRRate5. DifferenceBetweenBrazeandWeld
-
FiledUnder:ChemistryTaggedWith:alkali,alkalimetals,alkalimetalsvs,alkalivs,Arrheniusbase,base,basedissociationconstant,basevs,bases,basicsolutions,BronstedLowry'sbase,characteristicsofalkalimetals,characteristicsofbase,commonbases,conjugatebases,Group1metals,ionicsalt,Lewisbase,propertiesofalkali,propertiesofbase,Strongbases,Weakbases
Searchthiswebsite
LATESTPOSTS
DifferenceBetweenAnalysisandSynthesis
DifferenceBetweenHPStreamMiniandIntelComputeStick
DifferenceBetweenDualSIMandDualStandbySIM
DifferenceBetweenTrialCourtandAppellateCourt
DifferenceBetweenDatabaseandDataWarehouse
DifferenceBetweenPassionateandCompassionate
DifferenceBetweenHydraandObelia
DifferenceBetweenPersecutionandProsecution
DifferenceBetweenCourtandTrial
DifferenceBetweenHybridizationandCloning
Copyright20102014DifferenceBetween.Allrightsreserved. TermsofUseandPrivacyPolicy:Legal.
![tabebak.comtabebak.com/.../Applied_Physiology_mrcs.docx · Web viewApplied Physiology. Acid-base. pH = -log 10 [H+] Normal range is 7.36 - 7.44. Base-Deficit: Amount of acid/alkali](https://static.fdocuments.in/doc/165x107/5e83000ca401b564d134f125/web-view-applied-physiology-acid-base-ph-log-10-h-normal-range-is-736-.jpg)
