37 Chapter 3: Ions Ionic Compounds
https://www.mtsu.edu/chemistry/chem1010/pdfs/Chapter%203Ions%20Ionic%20Compounds%20and%20Nomenclature.pdf
Ion-Exchange-for-Dummies-RH.pdf
For instance table salt has exactly the same number of sodium cations (Na+) and chloride anions. (Cl—). Its formula is given as NaCl. When you dissolve a salt
Ionic compounds are compounds composed of ions charged
A metal plus a polyatomic ion yields an ionic compound. Formulas and Names of Some Polyatomic Ions. NH4. + ammonium. CO3. 2
Tutorial 2 FORMULAS PERCENTAGE COMPOSITION
https://www.eiu.edu/eiuchem/forms/tutorial2.pdf
Experiment 9 - Double Displacement Reactions
to balance out the charge on one carbonate ion and the formula of the compound The net ionic equation reaction (canceling out the spectator ions sodium ...
Naming Chemical Formulas Key
Write chemical formulas for the ionic compounds made from each set of ions: sodium potassium calcium magnesium barium ammonium aluminum potassium.
1 Determination of the Exchange Capacity of a Cation Ion
Exchange capacity can be measured by exchanging sodium ion (Na+) for In the equation R represents the ion exchange resin.
PRACTICAL 2: DETERMINATION OF SODIUM AND POTASSIUM
measurements of sodium and potassium ion concentration. • to introduce the simple concept of quantitation using a calibration curve.
The acetic acid contains an acetate ion. Sodium acetate also
If two reactions both involve the same ion then one reaction can effect the equilibrium position of the other reaction. The ion that appears in both
Ionic Compound Formula Writing Worksheet
Write chemical formulas for the compounds in each box. sodium sulfate Na2SO4 ... Give the name and molar mass of the following ionic compounds:.
[PDF] QUEST-CE QUUN ION
L'ion sodium possède 11 charges positives et 10 charges négatives Cet ion possède donc 1 charge excédentaire positive La formule de cet ion est Na+ L'ion
[PDF] Fiche 4 : Les composés ioniques
Pour respecter l'électroneutralité : 1 ion chlorure (charge (-)) s'associe avec 1 ion sodium (charge (+)) : 1(-) + 1(+) = 0 Cela forme le solide ionique : NaCl
[PDF] I-Définitions: Exemple : NaCl ? Na+ + Cl- NH3 + H2O ? NH4 + + OH
mol/Kg ou sans unité elle est calculée par la formule suivante : I = 1 ?Ci Zi des ions sodium Na+ et chlorure Cl? d'où : [Na+aq] = [Cl-aq] = 0 01Mol/
[PDF] Sentraîner à établir les formules de cristaux ioniques
Les anions sont les ions chlorure les cations les ions sodium : c'est le chlorure de sodium Nom des ions présents Nom du composé ionique les ions chlorure et
[PDF] Noms chimiques Formules - Ion hydrogène H
Noms et formules chimiques des ions à connaître en 3ieme Noms chimiques Formules Ion hydrogène H + Ion sodium Na + Ion calcium
[PDF] Leçon 2 : atomes et ions Physique chimie
Connaître la formule chimique de quelques ions ; savoir ce qu'est une solution ionique ; Exemple : Ion sodium : formule Na + et non Na 1+
[PDF] Tableau de certains ions polyatomiques Formules Constantes et
Constantes et conversions Solubilité des composés ioniques dans l'eau à 25 °C Ions - 1 Ions - 2 Ions - 3 Formule Nom Formule Nom Formule Nom
[PDF] Chapitre III LES CRISTAUX IONIQUES
chlore): la liaison peut alors être représentée à l'aide d'un atome de sodium ayant perdu un électron (ion Na + ) et d'un atome de chlore ayant capté un
[PDF] Ionspdf - Plus de bonnes notes
18 avr 2021 · Le sérum physiologique Le sérum physiologique est en réalité une solution d'ions sodium et d'ions chlorure de formule chimique
Quelle la formule de l'ion sodium ?
La formule de l'ion sodium est Na+, sa configuration électronique est : 1s2 2s2 2p6. 3. La matière étant électriquement neutre, pour compenser les charges négatives de l'ion oxyde O2?, il faut dans le solide ionique Na2O deux fois plus d'ions sodium Na+ que d'ions oxyde O2?.Quel est la charge de l'ion sodium ?
Les ions sodium Na+ portent une charge +1. Les ions chlorure Cl? portent une charge ?1. La matière étant électriquement neutre, il y a autant d'ions sodium que d'ions chlorure dans le chlorure de sodium.
1 DeterminationoftheExchangeCapacityofaCationIon-ExchangeResinIntroductionIonexchangeisaprocessinwhichionsattachedtoahighmolecularweightpolymerareexchangedforotherionsinsolution.Thehighmolecularweightpolymerisnormallyintheformofsmall,roundspherescalledbeads.Ionexchangeresinsareusedtodemineralizewaterandtoseparatemixturesofions.Oneimportantcharacteristicofionexchangeresinisitscapacity,expressedintermsofmilliequivalentsofexchangeableionpergramofresin.Exchangecapacitycanbemeasuredbyexchangingsodiumion(Na+)forhydrogenform(H+initiallyattachedtotheresin).Thehydrogenionisthentitratedwithstandardsodiumhydroxidesolution.Theexchangereactioncanberepresentedas:2R-H++2Na+(aq)+SO4-2(aq)⇔2R-Na++2H+(aq)+SO4-2(aq)Intheequation,Rrepresentstheionexchangeresin.Thereactionisanequilibriumprocess(shownbythedouble-headedarrow,⇔)andcanbeforcedtocompletionbyusing"concentrated"sodiumsulfatesolution.Solutionsneededforthisexperiment:SolutionpreparedbythestudentSolutionsuppliedbytheinstructor0.5MsodiumsulfatePhenolphthaleinindicator0.1000Msodiumhydroxide(standardizedbystudent)Instructionsforpreparingandstandardizingsodiumhydroxidesolutionarefoundattheendofthisexperiment.
2 Specializedequipmentneeded:Youwillbeusingachromatographycolumn(Figure1).Thecolumnisassembledfromthreepieces;arelativelylongglasscolumn,avalveassembly,andadeliverytip.Beforeusingthecolumn,testitforleaksbyfillingitwithwater.Ifitleaks,tellyourinstructorsothattheproblemcanbecorrectedbeforeyoustarttheexperiment.Placeasmallplugofglasswoolatthebottomofthechromatographycolumn.Theglasswoolpreventsbeadsofionexchangeresinfrompluggingthevalveassembly.Figure1.Chromatographycolumnassembledandloadedwithionexchangeresin.
3 ExperimentalProcedureAir-dryingtheresin1. Transfer~1gramofcationexchangeresintoa150or250mLbeaker.Coverthebeakerwithawatchglass,andstoreitinyourequipmentlockerovernight.2. DONOTDRYTHERESININTHEOVEN!Loadingthechromatographycolumn1. Fillthecolumn~2/3fullwithdeionizedwater.Removeanyairbubblesfromthecolumnbygentlytappingthesideswithaglassstirringrod.2. Accuratelyweighasampleoftheairdriedresin(~0.9-1.0grams)ontheanalyticalbalance,andtransfertoa50mLbeaker.3. Addabout25mLofdeionizedwatertotheresin,andtransfertheresinslurrytothecolumn.UseawashbottlecontainingDIwatertocompletelytransferallresintothecolumn.4. Ifnecessary,apieceofrubbertubingcanbeattachedtothedeliverytip,applyingintermittentpressuretothetubingcausingthewaterlevelinthecolumntoriseandfall,expellingairbubbles.(Youwillofcoursehavetoopenthevalveforthistowork).5. Oncethecolumnhasbeenprepared,adjustthewaterlevelsothatitis~1cmabovethetopoftheresinbed.DoNOTallowthewaterleveltofallbelowthetopoftheresinbed.Ionexchange1. Prepare~300mLof0.5Msodiumsulfatesolutionbydissolving21.3gramsofsodiumsulfatein~280mLDIwater.2. Add~5mLofthesodiumsulfatesolutiontothecolumn,andadjustthevalvesothatthesolutionpassesthroughthecolumnatarateof2-3mL/minute.3. Addfreshsodiumsulfatesolutiontothecolumn,in5mLportions,justoftenenoughtokeeptheliquidlevelfromfallingbelowthetopoftheresin.4. Collecttheeffluent(theliquiddrainingfromthebottomofthecolumn)ina500-mLErlenmeyerflask.Whenall300mLofsodiumsulfatehasbeenpassedthroughthecolumn,pass50mLofdeionizedwaterthroughthecolumn,collectingthedeionizedwaterinthesameflaskastheeffluent.
4 Titration1. Usingstandardized0.1000Msodiumhydroxidesolution,titratetheentirecontentsofthe500-mLErlenmeyerflasktothephenolphthaleinendpoint.NOTE:yougettoperformthistitrationONCE,sobeextremelycareful!2. Theexchangecapacity,inmilliequivalents/gramofresin,iscalculatedusingtheformula:Capacity=mLNaOH ! MNaOHmassresinLabreport.Asamplereportisfoundattheendofthisexperiment.WASTEDISPOSAL:Allliquidwastescanbepoureddownthesink.Discardresininthetrashcan.
5 Preparationandstandardizationofsodiumhydroxidesolution.1. Dry~2gramsofpotassiumhydrogenphthalate(KHP)intheovenfor2hoursat110oC.Removefromtheovenandstoreinadesiccator.2. Prepare1literof0.1Nsodiumhydroxidebyadding~500mLofdeionizedwatertoaclean1literplasticbottle.Addeither4.0gramsofsolidsodiumhydroxide,or8.0grams(~5.3mL)of50%sodiumhydroxidesolution(NOTBOTH).Mixthecontentsuntilthesodiumhydroxideiscompletelydissolved,andthenfillthebottlewithdeionizedwater.Capthebottleandmixbyshaking.3. Usingananalyticalbalance,dispensethree0.5gramsamplesofKHPintoseparatebeakersorflasks.MakesureyourecordthemassofKHPusedtofourdecimalpoints.Addabout25mLofwatertoeachsample.TheKHPshouldcompletelydissolve,butifitdoesn'tDON'TWORRYABOUTIT.4. ToeachKHPsample,add2-3dropsofphenolphthaleinsolution.5. TitrateeachKHPsamplewithyoursodiumhydroxidesolutiontothefirst,palepinkendpointthatisstableforatleast10seconds(Figure1).Theentirecontentsofthebeaker/flaskmustbepalepink,andthepalestendpointpossibleisthemostdesirable.Recordthevolumeofsodiumhydroxidesolutionused.6. Sodiumhydroxideconcentrationisfoundfromtheequation:NNaOH=gramsKHPMWKHPmLNaOHwheremLNaOHarethemillilitersofsodiumhydroxideneededtoreachthephenolphthaleinendpoint.ThemolecularweightofKHP(KHC8H4O4)is204.2212g/mole.Labelyoursodiumhydroxidesolutionwiththeaverageconcentrationfromthreetitrations.
6 Figure1.Acorrectpalepinkendpoint,andexamplesofotherpossible(wrong)endpoints.
7 SAMPLEREPORT:ALLVALUESAREFICTIONALANDAREUSEDFORILLUSTRATIONONLY!!ExchangeCapacity,CationResinUnknown#2T.A.LeeStandardizationofNaOHsolutionMass,KHP(grams)0.51210.51200.5122mLNaOH25.0525.0024.95Normality,NaOH0.10010.10030.1005AverageNormality,NaOH0.1003Exchangecapacitydata:Massofresinused(grams,airdried):0.9885mLNaOHusedtotitrate:35.05NormalityNaOH:0.1003Exchangecapacity:3.556meq/gCalculation:Exchangecapacity=(mLNaOHXNNaOH)/massResin=(35.05X0.1003)/0.9885=3.556meq/g
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