Real-Life Application of pH Scale

To prove that the pH Scale formula is correct and to relate what we have learnt about logarithms into reality, we have made this small little experiment.

For starters, we experimented on a drink that is very familiar to us -- Lemon Juice.

As we all know, Lemon is acidic. But how acidic is it? Let's find out!

By using the formula , we sub in some numbers:

Lemon has a Hydronium Ion number of 3.2 x 10^-3.

Thus

pH = -log(3.2 x 10^-3)

pH = 2.494

Round up to 2.49

Therefore the pH level of the Lemon Juice is 2.49. We cross-referenced it to several websites and confirmed that the acidity of Lemon juice is 2.49.

http://www.indiacurry.com/chutney/foodphlevel.htm

http://www.everydiet.org/diet/acid-alkaline-diets

http://answers.ask.com/Science/Chemistry/what_is_the_ph_level_of_lemon_juice