TESTING pH LEVEL
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B
TESTING pH LEVEL
TESTING pH LEVEL
BYDra. RAYA DEWI
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BASIC COMPETENCE
DESCRIBING ACID-BASE THEORY BY
DETERMINATION OF SOLUTION PROPERTIES AND
CALCULATE pH of solution
STANDARD OF COMPETENCE
UNDER STANDING ACID–BASE SOLUTION PROPERTIES,MEASUREMENT METHOD AND ITS APPLICATION
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AIM
Determining the pH of solution drinks using pH meter.
Comparing the results of pH measurements using a universal indikator with a pH meter.
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APPRATUS / CHEMICALS
APPRATUS CHEMICALS pH meter Aquadest 12 beaker 200 ml size Soda 2 beaker 400 ml size Soap sirih liquid pH meter Pocari sweat Test tube Kiranti
Vit.A.IPI Vit. Lemon Cofee and Tea
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1. Reconstituted various beverages and chemicals frequently
used in 50 ml beaker.
2. pH estimated using the universal indikator of acid – base.
3. pH is determined using a pH meter.
Note : Before measuring the pH electroda was immersed in
the buffer or aquades.
PROCEDURES
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THE RESULT OF EXPERIMENTUSING THE UNIVERSAL
INDICATOR
TEA : pH = 7
VIT. LEMON : pH = 4
POCARI SWEAT : pH = 4
COFEE : pH = 5
KIRANTI : pH = 4
SOAP SIRIH LIQUID : pH = 9
SODA : pH = 9
VIT. A . IPI : pH = 8
USING A pH METER
TEA : pH = 5
VIT. LEMON : pH = 3,04
POCARI SWEAT : pH = 4,9
COFEE : pH = 5
SOAP SIRIH LIQUID: pH = 13,79
SODA : pH = 8,58
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CONCLUSION
BY USING pH - METER ,WE CAN FIND THE INFORMATION OF pH DIRECTLY BY A DIGITAL SCREEN ON THE INSTRUMENT.
BUT, BASICALLY, MEASURING pH USING THE UNIVERSAL INDICATOR CAN GIVE A MEASUREMENT RESULT WHICH IS MORE PRECISE.
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PROCESS SKILL
READING SCALE
MEASURING pH
INTERPRATE OF THE DATA