Group 2

Question 1

why are group 2 elements reducing agents

Answer 1

they readily lose 2 s^2 electrons to reduce other element/ion and become 2+ ions

Question 2

why does reducing ability increase down group 2

Answer 2

• they lose e- more easily as…
• bigger atomic radius
• increased shielding
• less electrostatic attraction between valent e- and nucleus

Question 3

group 2 sulfates become ……. soluble down the group

Answer 3

less

Question 4

group 2 carbonates become ……… soluble down the group

Answer 4

less

Question 5

group 2 hydroxides become …….. soluble down the group. What does this mean?

Answer 5

more
- results in solutions with more OH- so alkalinity increases

Question 6

why do group 2 hydroxides quickly form solid ppts in water

Answer 6

they’re only slightly soluble in water

Question 7

why is IE3 of group 2 metals much bigger than their IE2

Answer 7

3rd e- removed from an inner shell closer to the nucleus

Question 8

reactivity down group 2 ………..

Answer 8

increases

Question 9

group 2 metals react with water to form

Answer 9

• hydroxides and H2 (g)
• alkaline solutions pH 10 - 12

Question 10

group 2 metals react with dilute acids to form

Answer 10

salt and hydrogen

Question 11

group 2 metals react with oxygen to produce

Answer 11

metal oxides

Question 12

A
what’s used in agriculture to neutralise acidic soils to help maintain optimum pH for crops

Answer 12

Ca(OH)2

Question 13

what’s used as antacids to neutralise excess HCl during indigestion

Answer 13

CaCO3 and Mg(OH)2