WILL MARK BRAINLIEST!!! *please answer correctly*
1 answer:
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Answer:
3.18x10⁻³
Explanation:
The equilibrium of a weak acid can be written as:
- HA ⇔H⁺ + A⁻
And Ka can be expressed as:
- Ka=
<u><em>Keep in mind that [H⁺] = [A⁻]</em></u>.
We can<u> calculate [H⁺] from the pH</u>:
- pH = 1.80 = -log[H⁺]
- [H⁺]=
=0.0158
Now we <u>compute the calculated [H⁺]</u> (and [A⁻]) <u>with the [HA] given by the problem</u>:
Ka = = 3.18x10⁻³