group 2 alkaline earth metals

Question 1

what are the properties of group 2 alkaline earth metals? (4)

Answer 1

1. All have two electrons in their outermost shell, s sub shell
2. Ionisation energy decreases down the group
3. Melting points decrease down the group
4. Redox reactions with water forms hydroxides and hydrogen

Question 2

What is the trend for solubility in group 2 hydroxides?

Answer 2

Increases down the group so pH increases as more OH- ions are released

Question 3

What are the two uses for group 2 hydroxides?

Answer 3

1. Mg(OH)2 - neutralises excess HCL in the stomach, for indigestion - antacids
2. Ca(OH)2 - neutralises acidic soils