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Hydronium ion
concentration of hydronium ions is 10 times the concentration of the substance with one point lower on the pH scale
This Danish Chemist introduced the concept of pH in 1909 as a convenient way of expressing acidity
You can measure pH by using a pH meter, pH paper or even an indicator such as universal indicator
Human blood stays in a very narrow pH range right around ( 7.35 - 7.45 ). Below or above this range means symptoms and disease.
If the blood pH moves too much below 6.8 or above 7.8, cells stop functioning and the patient dies
1.0EE-3 then log and change the sign (+/-)
The number of sig figs in the original # is = to the # of places to the right of the decimal in the log of the number
3.50 (+/-) INV log