CHEM 3111 Lab
[rev. 15 Jul 2015]
Note: many statistical functions in Excel have been deprecated in favor of new versions. So
far, Microsoft has preserved backwards compatibility with the older functions. Two functions in
this guide are affe
S15 CHEM 2125 Exam 1
Please bullet point your explanations in phrases. No explanation should require more than
3-4 bullet points for completeness.
1. Li2+ is isoelectronic with H.
(a) Why do the Bohr model (and the Rydberg equation) apply to both
S15 CHEM 2125 Exam 2
1. Group 1: (a) Putting a solid chunk of sodium in water results in a fiery reaction:
2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
This is an exothermic reaction because Group 1 metals have relatively [ high | low ]
CHEM 2125 Exam 3
3. This is the unit cell for a lanthanum oxide. (La is blue, O is red)
(a) Show, in detail, how to calculate its chemical formula.
1/8(8 O corners) = 1 O +1 reasonable O; +1 correct La
2 body O atoms = 2 O