The pH of water at 298 K and 1 atm pressure is 7.0. The pH of water
Was measured under these conditions by salespersons for several
Commercial pH meters. Which pH meter would you buy?

Question

Quizplus · Accepted Answer

The pH of pure water is 7.0 at 298K and 1 atm pressure. The accuracy of a pH meter is determined by its precision and its deviation from the true value. The pH meters in question vary in their precision, but their measurements differ from 7.0 to some extent. The best choice of pH meter would be the one that deviates the least from the true value of pH, which is 7.0. Amongst all the pH meters, meter 3 has the smallest deviation of only 0.004. Therefore, meter 3 would be the best choice.

The PH of Water at 298 K and 1 Atm ±\pm±

The PH of Water at 298 K and 1 Atm $\pm$