Explain the pH scale. How many hydrogen ions are present in a solution at pH 5 compared with those in a solution at pH 6?
What will be an ideal response?
The pH scale measures the concentration of hydrogen ions (H+)
in solutions. Neutral solutions, such as distilled water, have a pH of 7.0 . This means that
there is an almost equal concentration of hydrogen ions and hydroxyl ion (OH-). Solutions
with a pH above 7.0 are considered alkaline with a lower concentration of hydrogen ions.
Solutions with a pH below 7.0 are considered acidic and have a higher concentration of
hydrogen ions. There are 10¬-5 hydrogen ions in a solution at pH 5 and 10-6 hydrogen ions in
a solution at pH 6.
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Fill in the blank(s) with the appropriate word(s).
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