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What is the pH range of acidic solutions?
Above 7
Exactly 7
Below 7
0 to 14
Below 7
An acidic solution is characterized by a higher concentration of hydrogen ions (H+) compared to hydroxide ions (OHтИТ), resulting in a pH value strictly below 7 on the standard pH scale. At 25┬░C, neutral water has a pH of 7, while values lower than 7 indicate increasing acidity.
An acidic solution is characterized by a higher concentration of hydrogen ions (H+) compared to hydroxide ions (OHтИТ), resulting in a pH value strictly below 7 on the standard pH scale. At 25┬░C, neutral water has a pH of 7, while values lower than 7 indicate increasing acidity.
Think of the pH scale like a scorecard where 7 is neutral; scores dropping below 7 represent increasing acidity, much like temperatures dropping below freezing.
pH=тИТlog10тАЛ[H+] тАФ Definition of pH
[H+]>[OHтИТ] тАФ Condition for acidic solutions
The pH scale is a logarithmic measure of the activity of hydrogen ions in solution, defined mathematically as the negative logarithm of the hydrogen ion concentration. As the concentration of H+ ions increases, the logarithmic value decreases, placing acidic solutions in the range below 7.
The standard pH scale ranges from 0 to 14.
A pH value of exactly 7 is considered neutral.
Solutions with a pH below 7 are acidic.
Testing chemical properties in laboratory analysis
Monitoring agricultural soil and water quality
The ion-product constant of water (KwтАЛ) is 1.0├Ч10тИТ14 at 25┬░C.
Option A represents basic solutions, Option B represents neutral solutions, and Option D represents the full pH range.
C is correct тАФ Acidic solutions have a pH range below 7.
Remember that a change of one unit on the pH scale represents a tenfold change in hydrogen ion concentration due to its logarithmic nature.
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