La Neutralisation D Un Acide

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© E R P I Reproduction and adaptation permitted solely for classroom use with Observatory. 3. 2. 1. CRITERIA OBSERVATION acid-basereaction.anneutralization Observe GOAL base acidNeutralizinganwith a 33 LAB Name: 8. 7. 6. 5. 4. What acid?What is an When an acid is present, what will be the result of this test or or oftestwhatmeasurement? the this beresult will acid an is present, When ofacid?an the orto presence determineuse testyou measurement can What Observatory occurred?has acid-base reaction an neutralizationthat signs indicate What acid-basereaction?isanneutralization What measurement? this or result test will of whatthe ispresent, be basea When ofbase?a the orto presence determineuse testyou measurement can What isa base?What 11129-B Guide / Science labsScience 1 Class: TEXTBOOK: PROGRAMS: CONCEPT: LAB TYPE:LAB TOOLBOX Neutralizing an acid with a an base with Neutralizing acid Date: :

Pages Pages and39 20 Chapter 119 page 4, Acid-base Observation SE ST,EST, LAB 33 © E R P I Reproduction and adaptation permitted solely for classroom use with Observatory. 11. 10. • • • • • • MATERIALS Name: Record your observations in the table below. Give your table a title.Givea table below. your table observations in the Record your OBSERVATIONS Title: 50-mL 50-mL beaker PROCEDURE dropper of blue of bromothymolsolution dropper rack tube test pH paper universal paperlitmus 7)= (pH solution buffer Universal Universal pH paper 9. 8. 7. 6. 5. 4. 3. 2. 1. Observatory Clean up and put theput materials.andaway upClean the container.intodisposal beakers contents of the Empty the Litmus paper T of solution.the similiartocontrol colourthe becomes when colour the coloured Stop acid.hydrochloricsodium hydroxide the into the Slowly carefully and pour the results. indicator papers. solution Record with 20 more athan Pour little colour. solution.Record thethe control the colour of as visiblecolouras obtaina dropsbromothymol to the acid hydrochloric to Addenough blue of the results. indicator papers. solution Record Test with the 20 Pour solution. willcontrol as tube serve the test The contents of this colour. meaningful Record the colour. visible, to obtain a the solution dropsbromothymolbuffer solution to Addenough blue of Record the results. indicator(litmus pH). paperssolution universal and buffer with Test the 10 about Pour est the neutralized solution 11129-B Test Guide /

mL of hydrochloricthe into50-mL mL flask.acid Erlenmeyer of (HCl)

mL of buffer solution into thetube. intotestof solution buffer mL Buffer solution

mL of sodium hydroxide (NaOH) into the 50-mL beaker. Test 50-mLthe of (NaOH)beaker. sodium hydroxide the mL into with indicator papers. Hydrochloric Science labsScience • disposal container• disposal • tweezers • • • • 1 medium test tube (18 x 20mm) x tube testmedium(18 1 0.1 Erlenmeyerflask 50-mL 0.1 (HCl) acid 2

mol/L sodium hydroxidesolutionmol/L (NaOH) sodium mol/L acid hydrochloric (HCl) solution Record the results. Class: hydroxide Sodium (NaOH) Neutralizing an acid with a an base with Neutralizing acid Date: hydroxide hydroxide (NaOH) hydrochloric acid hydrochloric (HCl) and (HCl) sodium and Mixture of Mixture LAB 33 © E R P I Reproduction and adaptation permitted solely for classroom use with Observatory. Name: Bromothymol Blue Observatory solution 11129-B Guide / Science labsScience 3 Class: Neutralizing an acid with a an base with Neutralizing acid Date: LAB 33 © E R P I Reproduction and adaptation permitted solely for classroom use with Observatory. 5. 4. 3. 2. 1. YOUROBSERVATIONSON REFLECTING Name: 6. What happens to an acid when a base isadded?base a acid toanwhen What happens Have your observations helped you understand reactions? neutralization understand you your observations helped Have forwho someoneheartburn? isantacid recommendedhas Why formed?are substances acid hydrochloric with (NaOH),(HCl) whichtwosodium hydroxideWhen is neutralized new withpHof 7? we asolution dodescribe aHow Observatory thisprotocolfor lab? could the improve Howyou 11129-B Guide / Science labsScience 4

Class: Neutralizing an acid with a an base with Neutralizing acid Date: LAB 33