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Q: In a first-order reaction how does the rate change if the concentration of the reactant decreases to one-third its original value?
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Why does the percent ionization of acetic acid increase as the concentration of the solution decreases?

As you increase the concentration of the solution, the concentration of H+ does not change. Meaning, the concentration ionized does not change. Just the original concentration increases. Since percent ionization = (concentration ionized)/(original concentration) , and the original concentration is increased, the percent ionization therefore decreases.


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