so H* molarity is symbolized [H purp of hydrogen ion molarity-that appe Questions: iter, 1 in 10 million molecules in 1. How does the addition

so H* molarity is symbolized [H
purp
of hydrogen ion molarity-that
appe
Questions:
iter, 1 in 10 million molecules in
1. How does the addition of 1 M HCI change the pH of the buffer solution?
xide ions: HO = H* + OH
ble chemical reaction.) Pure water
tains equal amounts of H and ON
ales ionize, the molarity of H and
2. Graph the pl as a function of the drops of 1 M HC] added. The pH should be on the Y-axis and
ar = 10 M;
the drops of 1 M HCI on the X-axis.
1) was invented in 1909 by Danish by
Sorensen to measure the acidity of boy
0 to 14.0. A solution with a pH of 70
H below 7 are acidic; and solutions wi
aline). The lower the pH value, the ma
has and the more acidic it is. Since the
3. Based on the graph above, how would you describe the rate at which the pH value of the solution
range of one whole number on the sea
changed?
age in H* concentration. In other words,
times as acidic as one with pH 5 and I
ith pH 6.
of pH can seriously disrupt physiology
actions (see Deeper Insight 2 2), so it is is
arefully control its pH. Blood, for example
ing from 7.35 to 7:45. Deviations from
4. Compare the magnitude and rate of pH change of 1 M HCI added to DI water versus that of 1 M
ainting, paralysis, or even death. Chemic
anges in pH are called buffers. Buffers
HCI added to your buffer solution. changes and similarities did you observe?
considered in detail in section 24 3
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