January 2019 NY Regents Chemistry Exam
26 Which substance is an Arrhenius acid? (1) H2
(2) HCl
(3) KCl
(4) NH3
Solution: The definition of an Arrhenius acid is that it gives off H+ ions when dissolved in water. We can also look at Table K on the Reference Table for the common acids. HCl is listed in Table K.
Answer: 2
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