August 2019 NY Regents Chemistry Exam
34 What is the chemical name of the compound NH4SCN?
(1) ammonium thiocyanate
(2) ammonium cyanide
(3) nitrogen hydrogen cyanide
(4) nitrogen hydrogen sulfate
Solution:NH4SCN is made up from two polyatomic ions. Table E lists polyatomic ions with their formulas and names. NH4+ is ammonium and SCN- is thiocyanate. The name of an ionic compound consisting of two polyatomic ion is written as follows: name of the first polyatomic ion + name of the second polyatomic ion.
Answer: 1
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