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The Ethylammonium Ion, CH3CH2NH3+ Has a PKa of 10

Question 51

Multiple Choice

The ethylammonium ion, CH3CH2NH3+ has a pKa of 10.81. It reacts with water to form ethylamine, CH3CH2NH2 and H3O+ as shown below.
The ethylammonium ion, CH<sub>3</sub>CH<sub>2</sub>NH<sub>3</sub><sup>+</sup> has a pK<sub>a</sub> of 10.81. It reacts with water to form ethylamine, CH<sub>3</sub>CH<sub>2</sub>NH<sub>2</sub> and H<sub>3</sub>O<sup>+</sup> as shown below. Which of the following statements is true at pH 7? A) ethylammonium ion predominates B) ethylamine predominates C) the concentration of ethylamine equals that of ethylammonium ion D) the pH is higher than pK<sub>a</sub> of the ethylammonium ion Which of the following statements is true at pH 7?


A) ethylammonium ion predominates
B) ethylamine predominates
C) the concentration of ethylamine equals that of ethylammonium ion
D) the pH is higher than pKa of the ethylammonium ion

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