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B Y :

G O N Z A L E S , G L E N D A N .

M A N I L A Y , M A R A J E S S A B .

P U B L I C O , J O N A L Y N L .

Neutralizatio

n of acid and

base

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Neutralizatio !"e#iitio$

Inchemistry, neutralization or neutralisation,is a chemical reaction in which an acid and a

base react quantitatively with each other. In areaction in water, neutralization results in

there being no excess of hydrogen orhydroxide ions present in solution. The pH of

the neutralized solution depends on the acidstrength of the reactants. eutralization is

used in many applications.

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Neutralization (denition)

  In the context of a chemical reaction the termneutralization is used for a reaction betweenan acid and a base or al!ali. Historically, this

reaction was represented as"  acid + base = salt + water

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Importance

eutralization of acidic water is an importantstep in reclaiming land that was once mined.

#ine run$o% renders water around the mine siteacidic, and the acid must be neutralized withlime, or calcium oxide &'a() acting as a base,

before the area can be reclaimed. However, thisprocedure is expensive. *ecent studies have

shown that constructed wetlands+human$madeshallow ponds containing water plants such as

cattails+can be an e%ective and less costlymethod of neutralizing acid mine drainage.

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mpor ance o eascience

(a) To treat gastric patients

&i) nti$acids are medicines containing basessuch as aluminium hydroxide, l&(H)- and

magnesium hydroxide, #g&(H) to neutralisethe excess acid in the stomach.

(b) To treat wasp stings

&i) /asp stings are al!aline in nature.

&ii) 0inegar is used to cure wasp stingsbecause vinegar can neutralise the stings.

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Importance to health science

(c ) To treat bee stings

&i) 1ee stings and ant bites are acidic in nature.

&ii) They can be neutralises using al!aline

medicine such as ba!ing powder.

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Objectie

•  To determine the concentration of theneutralization of acid and base by

using titrimetric method or titration.

• To demonstrate the basic laboratorytechnique of titration

• To learn to calculate molarity based on

titrations

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!aterials Needed

Clean Gloves

Laboratory Gown Face Mask  

Hair Net

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!aterials Needed

PhenolphthaleinSolution

25% Soiu! Hyro"ie

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!aterials Needed

#$ N Hyrochloric aci solution   •  &ci an alkaline burette• 'urette holer• (ron Sta!

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!aterials Needed

Meicine ropper

)rlen!eyer *lask 

'eaker

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"rocedure

2. #easure 3 ml of Hydrochloric solution in4rlenmeyer 5as! using acid burette.

. 6ut the volume to zero mar!.

-. dd -$7 drops of 6henolphthalein 8olution thensha!e to mix.

7. 9sing an al!aline burette, put a !nown standardsolution of 8odium Hydroxide.

:. 6ut the volume to zero mar!.;. 8tart titrating the acid solution with ;ml 8odium

Hydroxide drop by drop.

<. 8ha!e occasionally until slightly pin! color

appears.

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#ata

• 0olume of acid = 3 m>

• 'oncentration of base = - #

•

0olume of base = ; m>

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$ormula

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%olution

  M + , C2 +2

  - .2#!L/ , .0M/ .1!L/  2# - , .0 " 1/

  - , 32#

  - , #$4 M HCl

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&onclusion

Titration is to determine theconcentration of some substance in asolution by slowly adding measured

amount of some other substance until areaction is shown to be complete.

 Therefore, titrimetric method is a carefultool to determine the exact concentrationof a given volume of acid. This can be goodreference with the treatment ofhyperacidity among patients.