Problem Set 2 Answer Key .pdf
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Chemistry Lesson: Steemit Edition Problem Set 2
1.) What type of compound is the following (ionic or molecular)
a. Fe(OH)2 Ionic ( Bonus INFO! Metal: Iron(II), Nonmetal: polyatomic ion Hydroxide we
know the type of iron because the OH- has a defined -1 charge, so the iron must be +2)
b. HCl Molecular (Hydrogen Chloride) (Here you have two nonmetals Hydrogen and
c. KCl Ionic (Here you have a metal: Potassium, and a nonmetal: Chlorine)
d. Na2CO3 Ionic (Here you have a metal: Sodium and a nonmetal: polyatomic ion
2.) Name the Following Compounds
It’s a metal and a polyatomic ion, so its ionic… named Lead (II) Hydroxide
Two non metals, so its molecular… named Hydrogen Bromide
This one is tricky (while its two non-metals, one is a polyatomic ION O2 -2 aka Peroxide)
it’s still a molecular compound but is named: Hydrogen Peroxide. If you called it
Dihydrogen Dioxide you would actually be correct by naming conventions and in fact the
official correct name for it is Dihydrogen Dioxide. This one is just an old name that stuck.
Metal and Polyatomic ion … named Mercury (I) Sulfide