What is alkaline?

What is alkaline?
Why is alkaline important?
Is alkaline the same as pH?
Is alkalinity the same as alkaline?
We’ll begin with the root of the word alkali.

ALKALI: the definition.
From the graphic here we can see the actual definition, but to ordinary folk like you and me, perhaps the easiest way to describe an alkali is simply to say it’s the opposite to an acid.

Keeping it simple, therefore we can state that something that is alkaline has all the properties of an alkali.

Now let’s look at how this word is used because here’s where it can get confusing. One common form of the word is alkalinity.
This definition by a British Dictionary is almost understandable!

Look at the second line. It says:
THE AMOUNT OF ALKALI (OR BASE*) IN A SOLUTION.
(*Base is another word for alkali).

So… something that is alkaline, or has alkalinity, has an amount of alkalis or alkaline minerals in it.

Yes, it may also have acids in it, but if there are measurably more alkalis than acids, it is seen as alkaline.
What Is Alkaline Water?
What Makes Alkaline Water Different?

Water is a combination of hydrogen and oxygen. That’s why you call it H2O. The amount of hydrogen ions in water is measured as pH. Alkaline water has less hydrogen — or a higher pH — than regular water. The lower the hydrogen level, the higher the alkaline levels.

Water’s pH level ranges from 0 to 14. Seven is considered neutral or balanced between acidic and alkaline. If water is below 7 on the pH scale, it’s “acidic.” If it’s higher than 7, it’s “alkaline.”

Bottled alkaline water has a pH level above 7. In some cases, manufacturers use a special device to change the chemical makeup of the water. Other times, they add nutrients to the water to change its pH.

For comparison, orange juice has a pH of 3.3 and black coffee is about a 5. Pure water has a neutral pH of 7. But tap water in the U.S. tends to fall below that — in the 4.3 to 5.3 range — depending on where you live.