The Buffer Needed for a Capillary Electrophoresis Experiment Must Have

question 11

Multiple Choice

The buffer needed for a capillary electrophoresis experiment must have a pH of 10.0.Which weak acid is the best choice for the buffer? Assume  = 0.

• A)ammonium chloride____________________ pKa = 9.24
• B)disodium phosphate____________________ pK_a = 12.38
• C)3-(Cyclohexylamino)propanesulfonic acid pK_a = 10.40
• D)sodium dihydrogen borate____________________ pK_a = 12.74
• E)cyclohexylaminoethanesulfonic acid____________________pK_a = 9.39

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