Experiment 1 Preparation of Buffer Solutions | Buffer Solution | Ph

 

 1EXPERIMENT 1: PREPARATION OF BUFFER SOLUTIONS

TABLE OF CONTENTSBil.Title Page

1Summary 2 2PictorialMethodology 33Results 5 4Discussions 6 5Tutorial 8 6Calculations 11 7Conclusions 15 8References 16

 

 2EXPERIMENT 1: PREPARATION OF BUFFER SOLUTIONS

1.0 SUMMARY

In this experiment, the objective is to prepare buffer solutions and test the effects of added acid or base upon the pH. It is also to review acid-base chemistry and calculation. Theexperiment is started by preparing the buffer solutions citric acid and sodium citrate. Weight outeach substances (3.560g of citric acid and 9.255g of sodium citrate) and add distilled water tomake a buffer solution. Then, determine the pH of the solution using the pH electrode. The pHvalue calculated is 5.00 compared with the experiment, the pH value obtained by the pHelectrode is 4.96. This slight different occur may come from several error that happened whilehandling the solution or while

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conducted the pH electrode. As conclusions, buffer solutions aresolutions that resistchange inhydronium ionand thehydroxide ionconcentration upon addition of small amounts of either acid or base, or upon dilution.

 

 3EXPERIMENT 1: PREPARATION OF BUFFER SOLUTIONS

2.0 PICTORIAL METHODOLOGY

2.1 Preparation of buffer solution2.1.1

Solid citric acid and sodium acetate have been mixed together to form a solution.Then the solution has been stirred using mechanical stirrer.2.1.2

500 mL of a 0.1 buffer solution with a pH of 5.0 using citric acid, C

6

H

8

O

7

and sodiumacetate, NaC

2

H

3

O

2

were prepared. The mixed solution of citric acid and sodiumacetate then dilute with distilled water in the volumetric flask.


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