The most convenient and has nearest approach to a universal pH measurement is
Correct answer: C. The emf method
- A. pH strips
- B. pH indicator
- C. The emf method
- D. The colorimetric method
Explanation
The emf method, often utilizing a pH meter, measures the voltage difference between electrodes and converts it to a pH value. This method provides precise, quantitative pH measurements across a wide range, making it the most universal and convenient option. In contrast, pH strips and indicators offer only rough estimates and are limited to specific pH ranges. The colorimetric method is also less precise and not ideal for universal applications.
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