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Flashcards in Chapter 9 Deck (10)
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1

amino acid

One of 20 building blocks of proteins.

2

amphiprotic

A molecule that can act as both a proton donor and a proton acceptor. The intermediate species of polyprotic acids are amphiprotic.

3

diprotic acids and bases

Compounds that can donate or accept two protons.

4

hydrolysis

"Reaction with water."

5

isoelectric focusing

A technique in which a sample containing polyprotic molecules is subjected to a strong electric field in a medium with a pH gradient. Each species migrates until it reaches the region of its isoelectric pH. In that region, the molecule has no net charge, ceases to migrate, and remains focused in a narrow band.

6

isoelectric point

The pH at which the average charge of a polyprotic species is 0. Same as isoelectric pH.

7

isoionic point

The pH of a pure solution of a neutral, polyprotic molecule. The only ions present are H+, OH-, and those derived from the polyprotic species. Same as isoionic pH.

8

polyprotic acids and bases

Compound that can donate or accept more than one proton.

9

speciation

Describes the distribution of an element or compound among different chemical forms.

10

zwitterion

A molecule with a positive charge localized at one position and a negative charge localized at another position.