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Forensic Chem:pH
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pH is a measure of the concentration of ______ in a given solution
hydrogen ions [H+]
pH <7
acid
pH =7
Netural
pH>7
Base
The pH scale is logarithmic
1 pH unit change = ___________
10x more or less acidic/basic
pH 2 is ____X _____ acidic than pH 4
100X more
pH 8 is ______X______ alkaline than pH 11
1000X less
Acid turn litmus paper:
red
_____have a sour taste
acids
____ produce H
3
O
+
in water
Acids
Acids react with metals to produce:
hydrogen gas
Bases turn litmus paper_____
blue
_____have a silppery/soapy feeling
Bases
____ produce OH- in water
bases
Bases react with acids to produce a ______
salt
Strong acids have a pH of
1,2
weak acids are typically
pH of 5,6
Strong bases have a pH of
13, 14
Weak bases have a pH of typically
8, 9
an indicator is
a chemical that changes color at different pH values
indicator papers or solutions are:
qualitative/ semi-quantitative
pH meters are:
quantitative
Author
minna528
ID
37645
Card Set
Forensic Chem:pH
Description
Understanding pH
Updated
2010-09-27T13:14:34Z
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