Which substance has the lowest pH?

Answer 1

Lemon Juice is the drinkable liquid with the lowest ph. It has a ph of 2. This is closely followed by Orange Juice with a ph of 3 and Tomato Juice with a ph of 4. Coffie, is next, followed by urine and distilled water. Hope this helped.

Answer 2

You are basically asking what the strongest acid is. Currently the strongest acid ever developed is called fluoroantimonic acid. It was developed by George A. Olah (who won a Nobel Prize for it in 1994). It is a mixture of antimony pentafluoride (SbF5) and hydrofluoric acid (HF). The SbF5 bonds to the F- to form SbF6, resulting in a "naked" proton. To measure the strength of strong acids, one cannot use a pH scale because the activity of the chemical species no longer correlates to concentration*. Instead, one uses H0 (the Hammett acidity function) to measure the acidity of super acids. The H0 of fluoroantimonic acid is -31.3. For comparison, the H0 of pure sulfuric acid is only -12.0, making fluoroantimonic acid over 10^19 times more acidic than pure sulfuric acid (like pH, the H0 scale is a log scale). * You may be familiar with the Keq equations from which Ka, pKa, pH, etc. are derived. You probably use concentration ratios when solving these things, but that is not technically correct. You are actually supposed to use activities, but at low concentrations, activities correlate very well with concentrations, but at high concentrations, this assumption does not hold true. Fun fact: The second strongest acid ever made (with an H0 of -19.2) is called "magic acid." No joke.

Answer 3

The lowest recorded ph is that off runaway mine water, with a ph as low as -3.5. This is controversial however as it is very difficult to measure ph that is below 0 are higher than 14.

Answer 4

Fluoroantimonic acid has the lowest pH :)

Answer 5

sulfuric acid has a pH of 0.3

Answer 6

ACID