Understanding Titration: Types, Applications, and Standardization
Explore the diverse world of titration, including different types like acid-base and precipitation, applications such as neutralization titration, and procedures for standardization using examples like NaOH and HCl solutions.
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Presentation Transcript
Standardization Standardization The Titration The Titration
TYPES OF TITRATION TYPES OF TITRATION 1-Acid base 2-Oxidation-reduction 3-Precipitation titration 4-Complex-formation titration
Applications of Neutralization Titration Applications of Neutralization Titration When a solution of a strong acid is mixed with solution of a strong base, a chemical reaction H+ (aq) + OH- (aq) H2O
Experiment Experiment 4 4 Preparation and standardization ( Preparation and standardization (0.1 ( (0.1 0.1 N) N) Na NaOH OH 1-Preparation of an (0.1N ) Na OH N = 0.1 N ) N ) HCL with HCL with ?? .???1000 ?? ???N = 0.1 V ml = 250 Eq. wt = 40 Wt = X = 1 Weigh (1gm ) of Na OH , Dissolve and dilute in volumetric flask with (250 ml ) by using distilled water .
2. Preparation 2. Preparation of (0.1N) N(HCl) = ??????????????? % of (0.1N) HCl HCl from concentrated from concentrated HCl ??? 1000 ?? .??????? HCl Specific gravity = 1.18 Eq.wt of HCl = 36.5 %38 ? . .. .. . N concentrated HCL = 12 To calculate the volume of concentrated HCL that should be taken to prepare 250 ml of (0.1N) HCL Conc.HCL Conc.HCL diluted HCL N1 V1 = N2 V2 12 X V1 = 0.1 X 250 V1 = 2.2 ml 2.2 ml should be taken from the concentrated HCL and should be diluted with distilled water in the volumetric flask with (250 ml ) to obtain ( 0.1 N) HCL ? of HCl is obtained from the reagent bottle diluted HCL
Standardization of ( Standardization of (0.1 0.1N ) N ) NaOH NaOH solution solution Procedure Procedure : : 1.Transfer (10.0 ml) of standard HCl solution to conical flask . 2. Add 1-2 drops of phenolphthalein(ph- ph)indicator it will be colorless . 3. Place a white sheet of paper under the flask to aid in the detection of any color change . 4. Fill the burette with the prepared NaOH solution . 5. Start titration by adding NaOH solution dropwise into the conical flask until the color of the solution is faint pink
6. The exact normality of NaOH is obtained from the following equation : HCl HCl + + NaOH NaOH NaCl NaCl + H + H 2 2O O N N1 1 V V1 1 (NaOH) ) = = N N2 2V V2 ( HCl 2
