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Subject Test Chemistry

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Subject Test Chemistry

Question 17 of 17

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Each of the questions or incomplete statements below is followed by five suggested answers or completions.  Select the one that is best in each case.

All of the following can act as Brønsted-Lowry acids (proton donors) in aqueous solution EXCEPT

Select an Answer

text HI end text

Correct Answer: 
No

text NH end text subscript 4 end subscript to the power of plus end exponent

Correct Answer: 
No

text HCO end text subscript 3 to the power of minus

Correct Answer: 
No

text H end text subscript 2 text S end text

Correct Answer: 
No

text NH end text subscript 3

Correct Answer: 
Yes

In aqueous solution, text HI end text can donate a proton and form text I end text text end text to the power of minus end exponent, text NH end text subscript 4 end subscript to the power of plus end exponent can donate a proton and form text NH end text subscript 3 end subscript, text H end text text C end text text O end text subscript 3 end subscript to the power of minus end exponent can donate a proton and form text C end text text O end text subscript 3 to the power of 2 minus end exponent, and text H end text subscript 2 end subscript text S end text can donate a proton and form text H end text text S end text to the power of minus end exponent. text NH end text subscript 3 end subscript does not donate a proton in aqueous solution to form text NH end text subscript 2 end subscript to the power of minus end exponent; therefore, choice (E) is the correct answer.

Question Difficulty: 
hard