The pH of Common Chemicals
pH is a measure of how acidic or basic a chemical is when it’s in aqueous (water) solution. A neutral pH value (neither an acid nor a base) is 7. Substances with a pH greater than 7 up to 14 are considered bases. Chemicals with a pH lower than 7 down to 0 are considered acids. The closer the pH is to 0 or 14, the greater its acidity or basicity, respectively
pH of Common Acids
Fruits and vegetables tend to be acidic. Citrus fruit, in particular, is acidic to the point where it can erode tooth enamel. Milk is often considered to be neutral, since it’s only slightly acidic. Milk becomes more acidic over time. The pH of urine and saliva is slightly acidic, around a pH of 6. Human skin, hair, and nails tends to have a pH around 5.
|Hydrochloric Acid (HCl)||0.0||Acid|
|Battery Acid (H2SO4 sulfuric acid)||1.0||Acid|
|Wine and Beer||4.0||Acid|
Neutral pH Chemicals
Distilled water tends to be slightly acidic because of dissolved carbon dioxide and other gases. Pure water is nearly neutral, but rain water tends to be slightly acidic. Natural water rich in minerals tends to be alkaline or basic.
7.0 – Pure Water
pH of Common Bases
Many common cleaners are basic. Usually, these chemicals have very high pH. Blood is close to neutral, but is slightly basic.
|Baking Soda (Sodium Bicarbonate)||8.3||Base|
|Milk of Magnesia||10.5||Base|
|Lime (Calcium Hydroxide)||12.4||Base|
|Sodium Hydroxide (NaOH)||14.0||Base|