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U-5
brighter glow of the detector bulb. The extent of ionization of pure distilled water, along with the ionization of
sucrose, acetic acid and hydrochloric acid in pure water will also be examined.
In Part II, the pH of an aqueous solution of magnesium oxide (MgO), a metal oxide, will be compared to the pH
of an aqueous solution of tetraphosphorus decoxide (P
4
O
10
), a non-metal oxide. The affect of moving down the
periodic table on the physical state of the halogens will also be examined.
In Part III, you will study the affect on the extent of ionization of changes to the structure in the chloroacetic acid
series (H3
-x
Cl
x©
-COOH). For this series, x = 0, 1, 2, or 3.
ADVANCE STUDY ASSIGNMENT
1.
Give two differences between metals and nonmetals.
2.
Review electronegativity in your textbook. How do electronegativities change for:
(a) the elements in period 4 as you go from K to Br?
(b) the elements in group 2A as you go from Be to Ra?
3.
Using values of Pauling electronegativity (
) from the Chemistry Data Sheet,
calculate
for the following compounds. On the basis of these values, classify the
bonding as ionic, polar covalent, or covalent.
a)
KBr
b)
HBr
4.
Would you expect KBr or Br2 to have the higher boiling point? Explain.
