I'd say anything below 5.
Anything which has a measureable pH which is less than 7 is considered "acidic" but it's not necessarily considered to be "an acid". To be considered to be an "acid", that entity must be willing to freely give up free H+ ions. And the lower the pH, the more of these "free" H+ ions does that entity have. Consider, for example, the difference between battery acid, vinegar, and blood from a person with Ketosis. Battery acid is "strongly" acidic and is considered to be a very strong acid, because it readily gives up free H+ ions (and it has a LOT of them, hence its low pH). Vinegar has fewer H+ ions and is still considered to be an acid albeit a "weak" acid. Now blood from a person who has Ketosis is acidic but is not considered to be an acid, because it does not have a high ratio of H+ / OH- ions. Hope this helps.
If anything above 7 is considered a base, then anything below 7 would be considered an acid. The pH scale ranges from 0 to 14, with 7 being neutral. Substances with a pH below 7 are acidic.
6.5 is considered to be a weak acid on the pH scale. 7 is considered neutral and a pH < 7 is considered an acid.
acid- 7 is neutral. Anything above 7 is alkaline and anything below is acidic.
A normal pH level on a pH scale is typically considered to be around 7, which is neutral. Anything below 7 is acidic, and anything above 7 is alkaline or basic.
An acid pH is a measurement that indicates a substance's level of acidity on a scale of 0 to 14. A pH below 7 is considered acidic, with lower numbers indicating higher acidity. Substances with an acid pH can be corrosive and cause irritation or damage to skin and surfaces.
If anything above 7 is considered a base, then anything below 7 would be considered an acid. The pH scale ranges from 0 to 14, with 7 being neutral. Substances with a pH below 7 are acidic.
A substance with a pH below 7 is considered acidic.
On the pH scale anything above 7 is basic and anything below 7 is acidic while 7 remains neutral.
6.5 is considered to be a weak acid on the pH scale. 7 is considered neutral and a pH < 7 is considered an acid.
acid- 7 is neutral. Anything above 7 is alkaline and anything below is acidic.
A normal pH level on a pH scale is typically considered to be around 7, which is neutral. Anything below 7 is acidic, and anything above 7 is alkaline or basic.
It's an Acid, it's number 4 on the pH scale, anything under 7 on the scale is an acid, anything above 7 is a base, and 7 exact is neutral. :P
An acid pH is a measurement that indicates a substance's level of acidity on a scale of 0 to 14. A pH below 7 is considered acidic, with lower numbers indicating higher acidity. Substances with an acid pH can be corrosive and cause irritation or damage to skin and surfaces.
When referring to acidity of a solution one uses the pH scale. The lower the number, the higher the acidity. Pure water is said to be neutral, and is a 7 on the scale. Anything with a lower number ranking is acidic, and anything with a higher ranking is basic.
An acid is below 7 on the pH scale and bases are above 7 on the pH scale. An acid can be a hydrogen donor, and a base is a hydrogen acceptor.
A pH level of 5.5 is slightly acidic. The neutral pH is 7, anything below 7 is considered acidic, and anything above 7 is considered alkaline.
Anything below pH=7 is considered acidic. The further you move from seven (the closer to zero) the more acidic it is