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Acetic acid (CH3COOH) reacts with water to form the acetate ion and the hydronium ion: Upper C upper H subscript c upper C upper O upper o upper H (a q) plus upper H subscript 2 upper o (l) double arrow upper C upper H subscript 3 upper C upper o upper O superscript minus (a q) plus upper H subscript 3 upper o superscript plus (a q). At equilibrium, the concentration of CH3COOH is 2. 0 × 10–1 M, the concentration of CH3COO– is 1. 9 × 10–3 M, and the concentration of H3O is 1. 9 × 10–3 M. What is the value of Keq for this reaction? 1. 8 × 10–5 5. 5 × 104 9. 5 × 10–3 1. 1 × 102.

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The value of Keq for this reaction is [tex]\bold{1.8 \times 10^-^5}[/tex]

The correct option is (A).

What is acetic acid?

Acetic acid is an organic compound also called ethanoic acid. It is a colorless liquid with a chemical formula   [tex](CH_3COOH)[/tex].

It has antibacterial and antifungal properties.

When acetic acid is reacted with water, it completely dissolves in it.

Thus, the correct option is A, [tex]\bold{1.8 \times 10^-^5}[/tex].

Learn more about acetic acid, here:

https://brainly.com/question/12924347

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