Khamis, 16 Februari 2012

Experiment 4 sem II PDT KMS


A)    A)  pH measurement for acid and base solutions

Solution
Indicator
pH paper
pH meter
Methyl red
Methyl orange
Alizarin yellow
HCl
0.01M





1.0M





CH3COOH
0.1M





1.0M





NaOH
0.1M





1.0M





NH3
0.1M





1.0M





           
B)     B) pH measurement of salt solutions

salt solutions
pH paper
Universal indicator
Acidity
NaCl                0.1M



CH3COONa    0.1M



NH4NO3              0.1M




C)     C) Determination of the dissociation constant of a weak acid, Ka

Burette reading
mL
initial

final

Volume NaOH used


pH meter reading : ____

              pH = pKa + log [salt]
                                  [acid ]

pH = pKa 
           Ka = [H+] = _______

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