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PH is equal to -log[ hydrogen ion]. You always have to use the concentration of the hydrogen ions. The concentration has to be in Molarity (moles per liter). If your concentration was actually 10 moles per liter, your PH would be -1. If it was 8 moles per liter, it would have a PH of -.903. The PH can actually go below 0 if you are using a strong acid in a very high concentration, but that would be dangerous.

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14y ago
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11y ago

pH = -log[H+] = -log(8-10) = -log(9.313-10) = 9.0309 = 9.03

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If [H+] = 10-8 is meant as concentration value, then the pH = -log[H+] = -log(10-8) = 8.00

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13y ago

By definition pH = -log[H+] so:

pH = -log(1*10-4) = 4.0

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11y ago

[H+] = 10-4 and pH = - log10 [H+] so log10 10-4 = -4 . So --4 =+4 pH = 4 - mildly acidic.

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12y ago

pH 8

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14y ago

eight (8)

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10y ago

pH2

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Q: What is the pH of a solution if the H molarity is 10 to the -4th power?
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