pH Scale & Hydrogen Ion Concentration
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10 Terms
1
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What does pH measure?
The concentration of hydrogen ions in a solution.
2
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What does a low pH mean?
High hydrogen ion concentration, the solution is acidic
3
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What does a high pH mean?
Low hydrogen ion concentration, the solution is basic (alkaline)
4
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What is the pH of pure water?
pH 7, it is neutral
5
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What pH values are considered acidic?
pH 0-6.9
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What pH values are considered basic?
pH 7.1-14
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How much does hydrogen change with each pH unit?
10x
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If a solution changes from pH 3 to pH 6, how much less acidic is it?
1000x less acidic (10x10x10)
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Is stomach acid acidic or basic? What’s its pH?
Acidic, about pH 2
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Is blood acidic or basic? What’s its pH?
Slightly basic, pH 7.35-7.45
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