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Scilla [17]
3 years ago
10

[PLEASE ANSWER ASAP, ON TIME LIMIT!] The pH level of a substance can be determined by the formula pH = –log[H+], where [H+] is t

he hydrogen ion concentration in moles per liter. An alkaline substance has a pH level between 7 and 14. Which ion concentration corresponds to an alkaline substance?
Answer choices in picture.

Mathematics
1 answer:
Daniel [21]3 years ago
6 0

Answer:

Option (2)

Step-by-step explanation:

pH level of a substance is determined by the formula,

pH = - log[H+}

where [H+] is the hydrogen ion concentration

Let the [H+] ion concentration = a

a = -log[H+]

log[H+] = -a

[H+] = 1 × 10^{-a}

Here 'a' is between 7 and 14.

Which means an alkaline substance must have the concentration between 1\times 10^{-7} to  1\times 10^{-14}.

From the given options, 5\times 10^{-12} moles per liter lies in the given range.

Therefore, Option (2) will be the answer.

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