Question
Download Solution PDFWhich of the following statements is/are correct regarding the pH scale?
I. The pH of a neutral solution is 7.
II. Values more than 7 on the pH scale represent an acidic solution.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Option 1.
Key Points
- The pH scale ranges from 0 to 14, where 7 is considered neutral.
- The pH of a neutral solution, such as pure water, is exactly 7.
- Values less than 7 on the pH scale represent an acidic solution.
- Values greater than 7 on the pH scale represent a basic (alkaline) solution, not an acidic one.
- The pH scale is logarithmic, meaning each whole number change represents a tenfold change in acidity/basicity.
Additional Information
- Definition of pH
- pH stands for 'potential of Hydrogen' or 'power of Hydrogen'.
- It measures the hydrogen ion concentration in a solution.
- Applications of pH Measurement
- pH measurement is crucial in chemistry, biology, medicine, agriculture, and many other fields.
- It is used to determine the acidity or alkalinity of soil, water, and other substances.
- Indicators of pH
- Litmus paper, pH paper, and pH meters are commonly used to measure pH.
- Indicators change color at specific pH levels, providing a visual representation of pH.
- Importance of pH in Biological Systems
- Maintaining proper pH is essential for many biological processes.
- Human blood has a pH of around 7.4, which is slightly basic.
- Enzyme activity and metabolic functions are highly pH-dependent.
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