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Chapter 2 Section 2-2
Acids, Bases, and pH
20
Biology
10th Grade
09/13/2010

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Term
A water _______ can react to form ions.
Definition
molecule
Term
A reaction is summarized as ___ ~ __ + ___
Definition
H20 ~ H+ + OH-
Term
The ~ indicates that the ________ can occur in either direction.
Definition
reaction
Term
The H+ is called a ________ ion.
Definition
hydrogen
Term
The OH+ is called a _________ ion.
Definition
hydroxide
Term
When the H20 molecule dissociates, a single hydrogen atom comes off and leaves its _______ with the oxygen-hydrogen particle.
Definition
electron
Term
The H+ is called a ________ ion.
Definition
hydrogen
Term
The OH- is called a _________ ion.
Definition
hydroxide
Term
In pure water, about 1 water molecule in 550,000,000 reacts to form ions. Water stays neutral because the H+ and OH- ions are produced in _____ numbers.
Definition
equal
Term
A solution that has more H+ ions than OH- ions is called an ____. (Remember an H+ ion is called a ________ ion.)
Definition
acid
hydrogen
Term
A solution that has more OH- ions than H+ ions is called a ____. (Remember an OH- ion is called a _________ ion)
Definition
base
hydroxide
Term
Chemists devised a system to indicate the concentration of ________ and _________ ions in solution.
Definition
hydrogen
hydroxide
Term
The pH scale ranges _ to __.
Definition
0
14
Term
At a pH of 7, the concentration of ________and _________ ions is equal.
Definition
hydrogen
hydroxide
Term
Solutions with a pH below 7 are called ____ because they have more H+ than OH- ions. The _____ the pH, the _______ the acidity.
Definition
acids
lower
greater
Term
Solutions with a pH above 7 are called _____ because they have more OH- than H+ ions. The ______ the pH, the more _____ solution.
Definition
bases
higher
basic
Term
Each sstep in the pH scale represents a factor of 10. For example, a solution with a pH of 4 has 10 times as many ________ ions as a solution with a pH of 5.
Definition
hydrogen
Term
An ____ is a compound that forms ___ ions in solution.
Definition
acid
H+
Term
Acidic solutions contain higher concentrations of ___ ions than pure water and have pH vales below __.
Definition
H+
7
Term
Strong acids have pH values from 1 to 3. THe hydrochloric acids produced by the stomach is a _____ acid.
Definition
strong
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