Everybody knows this. The pH of lemon juice … Lemons are extremely acidic. Because foods are not known to alter the pH of your blood or body, lemons won't acidify you either. To put that in perspective, the pH of battery acid(sulfuric acid) is 1.0, while the pH of an apple is about 3.0. Bottom Line: A food's pH is a measure of its acidity. Lemon juice has a pH of around 2.0, ranging between 2 and 3. Alkaline water also has a negative PRAL score, just like lemon juice, alkaline water gets it’s alkalinity from the alkaline minerals in it. Anything measuring 6.9 or below is considered an acid, and anything rating 7.1 and above is considered an alkali. How about we get this straight and explain 10 advantages of consistently bringing lemon juice with warm water (note: NOT equivalent to lemonade!) While water has a pH of 7, lemons are acidic, measuring at 2 to 3, according to Elmhurst College. This is a non-issue. To make the ultimate lemon water body alkalizer, you simply add lemon juice to alkaline water, and add a pinch of cayenne pepper. There is regularly misjudging of lemon’s pH outside the body versus inside the body. Any chemical with a pHless than 7 is considered acidic. Lemon juice has a pH falling between 2 and 3, which makes it 10,000–100,000 times more acidic than water. Outside the body, lemon juice is acidic (pH is beneath 7).