Ch. 18 Acids and Bases

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1

acid-base indicator

a substance that marks the end point of an acid-base titration by changing color

2

end point

the point in a titration at which an indicator changes color

3

equivalence point

the point at which the two solutions used in a titration are present in chemically equivalent amounts

4

neutralization

reaction in which an acid reacts with a base and forms water and a salt

5

salt

an ionic compound composed of a cation from a base and an anion from an acid

6

standard solution

solution of known concentration

7

titration

method for using a neutralization reaction to determine the concentration of a solution

8

buffer

solutions which resist changes in pH

9

Arrhenius acid

produces H+ ions in solution

10

Arrhenius base

a substance that increases the concentration of hydroxide ions, OH-, in aqueous solution

11

Bronsted-Lowry acid

H+ donor

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Bronsted-Lowry base

H+ acceptor

13

Lewis acid

electron pair acceptor

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Lewis base

electron pair donor

15

anhydrides

"without water"
substance that becomes an acid/base when water is added

16

phenolphthalein

common indicator turns purple with excess OH- ions

17

strong acids

acids which completely ionize in aqueous solution

18

weak acid

acids which do not dissassociate completely and therefore do not produce many H+ ions in solution

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monoprotic acid

acids which have 1 hydrogen to donate in an aqueous solution

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diprotic

acids which have 2 hydrogen to donate in an aqueous solution

21

triprotic

acids which have 3 hydrogen to donate in an aqueous solution