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Identify the properties of this acid-base solution and predict
its pH!
Member of Group:
1.___________________________________
2.___________________________________
3.___________________________________
4.___________________________________
Class : ____________________________________
Standard of Competence
4. Understanding the properties of acid base solution, the
measurement
method and its application
4.1 Describing the acid base theories by determining the
solutions
properties and calculating the solutions pH.
Basic Competency
Indicator
1. Identifying the properties of acid-base solution with various
indicators.
2. Predicting the pH of unknown electrolyte solution based on
observation result
of the color changing trajectory of various acid-base
solution
Experimental Worksheet
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Materials :
Universal indicators paper
Blue litmus paper
Red litmus paper
HCI 0,1 M solution
H2SO4 0.1 M solution
CH3COOH 0,1 M solution
H3BO3 0.1 M
NaCl 0.1 M
NaOH 0,1 M solution
Equipments :
Pipettes
Test tube
Test tube rack
Procedure:
1. Take 1 ml of each solutions that will
be identified and measured the pH than put each solution into
test tubes. After that,
take each solution using pipettes about 5 drops and put into
plat. Give symbol or
label in every hole of plat of each solutions.
2. Take the cutting universal indicators
paper and dip the side into each solution in plat. Look at the
changing color.
3. Match the color of universal
indicators paper from activity 2 with standard colors are there
in the pack of
universal indicators paper than read its pH scale. Repeat the
experiment by using
Identify the properties of this acid-base solution and predict
its pH !
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blue litmus paper and red litmus paper. Observe the changing
colour of blue litmus
paper.
Observation Result :
Complete the following table of observation data!
No.Acid/Base
SolutionpH
Blue litmus
paper
Red litmus
paper
Propertis of
solution
1. HCl 0,1 M
2. H2SO4 0.1 M
3. CH3COOH 0,1 M
4. H3BO3 0.1 M
5. NaCl 0,1 M
6. NaOH 0,1 M
Analyze Data
1. Based on the value of pH, determine the acid/ base, strong/
weak!
________________________________________________________
2. Based on the changing colour of blue litmus paper determine
the acid/ base!
______________________________________________________________
3. Determine the concentration of H+ in solution 1 until 3 and
the concentration of OH -
in solution 4 until 6!
____________________________________________________________________
____________________________________________________________________
Conclusion
Make conclusion of this experiment!
Answer:
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______________________________________________________________________
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---- Good Luck ----
