Group 2: The Alkaline Earth Metals
Name
Part A – Solid and Water
Ca + HOH: Result of the test for H2 gas
Result of the test of adding phenolphthalein
Mg + HOH: Result of test for H2 gas
(before heating)
Mg + HOH: Result of test for H2 gas
(after heating)
Result of the test of adding phenolphthalein
Part B - pH
Mg(OH)2
Ca(OH)2
Ba(OH)2
Part C - Solubility
MgSO4
CaSO4
BaSO4
Honors Chemistry
Unit 5 – Periodic Law
Part D
Precipitate - addition of Na2CO3
Observations
MgCl2
CaCl2
BaCl2
Questions:
1. Below is a list of compounds that were formed or used in this experiment. Write the correct
formulas for each:
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
calcium hydroxide
magnesium hydroxide
barium hydroxide
calcium sulfate
magnesium sulfate
barium sulfate
sodium carbonate
magnesium chloride
calcium chloride
barium chloride
2. Describe the reactivity of the metals in Group 2 in terms of their location in the group.
3. How does the reactivity of an alkaline earth metal compare with that of an alkali metal
(Group 1) in the same period?
4. What oxidation states can the alkaline earth metals exhibit?
Honors Chemistry
Unit 5 – Periodic Law
5. Why does the metallic character of the alkaline earth metals increase as you go down the
group?
Conclusion:
Honors Chemistry
Unit 5 – Periodic Law