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Phoenix [80]
4 years ago
7

`Suppose you have a sample that has a low pH (acidic). What would be true of the [OH-]?

Chemistry
1 answer:
Murljashka [212]4 years ago
4 0

Answer:

A sample that has low pH, will have a [OH⁻] < 1x10⁻⁷

Explanation:

Kw = 1x10⁻¹⁴

[H₃O⁺] = 1x10⁻⁷

[OH⁻] = 1x10⁻⁷

If pH is very low, [H₃O⁺] > 1x10⁻⁷

For example,  [H₃O⁺] = 1x10⁻³ M

- log [H₃O⁺]  = pH

- log 1x10⁻³ M = pH = 3

[OH⁻] will be < 1x10⁻⁷

For the example we made before

pH = 3

pOH = 14 - pH → 11

10^-pOH = [OH⁻]

10⁻¹¹ = 1x10⁻¹¹

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