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It would be dependent on whether you are referring to acids or bases. 14 is the most dangerous base and 1 is the most dangerous acid. The equivalent of the most dangerous acid is very high and it is stronger than stomach acids. The number sequence is counting up to 14 but the middle number 7 is neutral, so it is basically water or something very simple.

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11y ago
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5mo ago

The highest level on the pH scale is 14, which represents a strong alkaline or basic solution. This level indicates a high concentration of hydroxide ions in the solution. Solutions with a pH of 14 are highly corrosive and can cause chemical burns.

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15y ago

The pH scale uses numbers, not colors, so the question as asked makes no sense. There are pH test strips which are used to give a rough indication of pH; in the ones I'm familiar with, the most alkaline range (the highest pH value the strips can indicate) is usually blue and the most acid range (the lowest pH value the strips can indicate) is usually red. However, this is due to the specific choice of indicators made by the manufacturer, so you should consult the color chart for the particular brand of pH test strips you're using for a definitive answer.

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11y ago

Nominally zero, though in practice it's possible for solutions to be even more acidic than that. A 10 M solution of an ideal strong monoprotic acid would have a pH of -1, for example. At concentrations this high, even strong acids may not dissociate fully, though.

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13y ago

Theoretical high of 14.

I have come across pH values in the minus range so it may be greater than 14, not sure on that part

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11y ago

Probably one of the super acids, such as fluoroantimonic acid, which is known to be one of the strongest known acids. So acids have the highest concentration of hydrogen on the pH scale.

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8y ago

The strongest acid is H2SbF6.

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Q: What is the highest level on the pH scale?
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