topic 4

Question 1

what do group 2 metals react with water to form?

Answer 1

metal hydroxides and hydrogen

Question 2

what do group 2 metals react with chlorine to form?

Answer 2

metal chlorides

Question 3

can magnesium react with cold water and why?

Answer 3

no because it is the least reactive. however it can react with steam to form MgO

Question 4

as you go down the group, what is the trend in how alkaline they are and why?

Answer 4

they become increasingly alkaline as the hydroxides become more soluble

Question 5

how is an alkaline solution formed?

Answer 5

when hydroxides dissolve in water

Question 6

group 2 hydroxides and sulphates have ______ solubility as you go down the group.

Answer 6

opposite

Question 7

going down the group, the solubility of metal sulphates ________.

Answer 7

decreases

Question 8

going down the group, solubility of metal hydroxides ________.

Answer 8

increases

Question 9

what do carbonates break down into in thermal decompostition

Answer 9

metal oxides and carbon dioxide

Question 10

what do nitrites break down via thermal decomposition?

Answer 10

metal oxides, nitrogen dioxide and oxygen.

Question 11

carbonates and nitrates become more _______ as you go down the group

Answer 11

stable

Question 12

lower charge density means less _______ which means more _______

Answer 12

distortion, stability

Question 13

which group 1 is the exception to most things?

Answer 13

lithium

Question 14

carbonates are thermally stable under a bunsen burner except for _______ which forms _______

Answer 14

lithium carbonate, lithum oxide and co2

Question 15

nitrates break down into _________ except lithium which decomposes into ________

Answer 15

nitrites and oxygen
lithium oxide, nitrogen dioxide and oxygen.