What range on the pH scale is considered alkaline?

The correct range on the pH scale that is considered alkaline is from 7.1 to 14. The pH scale measures how acidic or alkaline a substance is, with a scale ranging from 0 to 14. A pH of 7 is considered neutral, which means it is neither acidic nor alkaline.

Alkaline substances have a pH greater than 7, indicating they have a lower concentration of hydrogen ions compared to neutral substances. The range from 7.1 to 14 specifically captures all the alkaline variations, with increasing alkalinity as the number rises towards 14. Therefore, any substance with a pH higher than 7 is considered to be alkaline.

Choices indicating ranges below 7, such as those that suggest pH values up to 6.9 or from 7.0 to 7.9, do not accurately represent alkaline conditions, as they fall within the acidic (0-6.9) or closer to neutral (up to 7.9) spectrum on the pH scale. The option that suggests a narrower range from 8 to 10, while it does refer to alkaline levels, does not include the complete range of alkalinity that spans to 14, thus