chem32A Lab quiz3

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SJCC
Chem. 32A
Prof. Song
Quiz #3 (a)
Name:
1.
Name or give chemical formula of the following compounds:
(4 pt)
(a) HClO3(aq)
(b) H3PO4(aq)
(c) Hydroiodic acid
(d) sodium phosphate
2.
Classify the following compounds as ionic or covalent.
(4 pt)
(a) Calcium chloride, CaCl2
(c) Sucrose, C12H22O11
3.
Draw Lewis dot structure and predict the three-dimensional molecular geometry
around the central atom for each:
(8 pt)
Lewis structure (show all
bonding and nonbonding
electrons)
Molecular structure
(linear, trigonal planar,
trigonal pyramid,
tetrahedral)
CH4
NH3
Circle the best answer for the following: (4 pt)
4.
In which of the following cases is a polar covalent bond formed?
(a)
(b)
(c)
(b)
when an electron is transferred from one atom to another
when the electrons of a bond are shared equally by the two atoms
when the electrons of a bond are shared unequally by the two atoms
when a metallic element forms a bond with a non-metallic element
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