Bench Ph Meter
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How would the pKa of an unknown acid be affected (higher or lower or no change)?
If the following errors occured, please explain.
a. the pH meter was incorrectly calibrated to read lower than the actual pH
b. During the titration several drops of NaOh missed the reaction beaker and fell onto the bench top.
c. If the acid was dissolved into 75mL of distilled water rather than 50mL
*(Lower the pKa , greater is the acidity , i.e, lower the Ph value)*
a. pKa will be lower than expected.
b. pka will be lower than expected.( normality of acid higher , Ph lower , pKa lower )
c. pka will increase. ( normaility decreases , ph increases, pKa increases. )
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January 16th, 2011 in
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