bab 3.docx

CHAPTER III

METHODOLOGY EXPERIMENT

III.1 Variable Experiment

1. NaOH : O,06 N, 0,08 N

2. H2SO4 : 0,08 N, 0,09 N

III.2 Materials Used

1. H2SO4 0,09 N

2. H2SO4 0,08 N

3. NaOH 0,08 N

4. NaOH 0,06 N

5. Aquadest

6. Buffer pH 7

III.3 Tools Used

1. Beaker glass

2. Buret

3. Erlenmeyer

4. Watches glass

5. Measuring cup

6. Flask

7. Balance analytical

8. pH meter

9. Pipette drops

10. Spatula

11. Funnel

12. Stative and clamp

III.4 Experimental Procedure

III.4.1 Calibration Tool Phase

1. Prepare the buffer pH 7 in a glass beaker.

2. Dip the electrode into buffer pH 7.Mencatat pH dan E (mV).

3. Noted pH and E (mV)

III-1

Methodology Experiment

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III.4.2 Potentiometric Analysis Phase

1. Make a solution of NaOH O, 05 N, 250 ml.

a. Considering 0,24 gram NaOH into a watch glass.

b. Entering aquadest which had been taken earlier in the 250

ml flask.

c. Enter 0,24 gram NaOH in 250 ml flask.

d. Add aquadest in a volumetric flask of 250 ml volumetric

flask.

e. Shaking the solution in the flask until it becomes

homogeneous.

f. Using the same procedure for NaOH 0.06 N.

2. Make a solution of H2SO4 0,08 N, 250 ml.

a. Taking 0,22 ml H2SO4 into the measuring cup.

b. Entering aquadest which had been taken earlier in the 250

ml flask.

c. Enter 0,22 ml H2SO4 in 250 ml flask.

d. Add aquadest in a volumetric flask of 250 ml volumetric

flask.

e. Shaking the solution in the flask until it becomes

homogeneous.

f. Using the same procedure for H2SO4 0,09 N.

3. Measure the initial conditions of pH and mV of each solution with

initial volume of 25 ml.

4. Perform titration where NaOH 0.05 and 0.06 N as titers and 0.06

N H2SO4 solution; 0.05 N as analat.

5. Record the pH and mV for each additional 1 ml titers. Titration is

done to increase already 10 times.

6. The same titration with reversing function of H2SO4 0.08 N; 0.09 N

as titers and 0.0 5 N NaOH solution; 0.06 N as analat.

III-2



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III.3 Flowchart of Experiments

III.3.1 Calibration Tool Phase

Start

III.3.2 Potentiometric Analysis Phase

III.3.2.1 Make a solution of NaOH O, 05 N, 250 ml.

III-3

Prepare the buffer pH 7 in a glass beaker.

Dip the electrode into buffer pH 7.Mencatat pH

dan E (mV).

Noted pH and E (mV)

Finish

Start

Considering 0,24 gram NaOH into a watch glass

Entering aquadest which had been taken earlier in the

250 ml flask.



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III.3.2.2 Make a solution of H2SO4 0.08 N 100 mL

III.3.2.3 Prosedur Analisa Potensiometri

III-4

Enter 0,24 gram NaOH in 250 ml flask.

Shaking the solution in the flask until it becomes

homogeneous.

Add aquadest in a volumetric flask of 250 ml volumetric

flask.

Finish

Start

Taking 0,22 ml H2SO4 into the measuring cup

Entering aquadest which had been taken earlier in the

250 ml flask.

Enter 0,22 ml H2SO4 in 250 ml flask and add aquadest in

a volumetric flask of 250 ml volumetric flask.

Shaking the solution in the flask until it becomes

homogeneous.

Using the same procedure for H2SO4 0,09 N.

Finish

Start

Make a solution of NaOH O, 05 N, 250 ml.

Using the same procedure for NaOH 0.06

N.



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III-5

Perform titration where NaOH 0.05 and 0.06 N as titers

and 0.06 N H2SO4 solution; 0.05 N as analat.

Record the pH and mV for each additional 1 ml titers.

Titration is done to increase already 10 times.

The same titration with reversing function of H2SO4 0.08

N; 0.09 N as titers and 0.0 5 N NaOH solution; 0.06 N as

analat.

A

A

Selesai



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III.4 Image Tool Experiment

Beaker glass Buret

Watches glass

III-6



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Erlenmeyer

Measuring cup

Flask

Balance analytical

pH meter

Pipette dropsSpatula

III-7



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Stative and clampFunnel

III-8

bab 3.docx

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