group 2

Question 1

magnesium with warm water

Answer 1

slow , no flame,

mg +2h20 -> mg(oh)2 + h2

Question 2

magnesium with steam

Answer 2

bright white flame

mg+h20-> mgo + h2

Question 3

rest of group 2 metals with water

Answer 3

become oxidised, react w 2 water to give the hydroxide and hydrogen

Question 4

trend w water as you go down group

Answer 4

faster down, less ppt down

Question 5

observations with water

Answer 5

fizzing, metal dissolving, solution heating

Question 6

magnesium with oxygen

and when does it happen

Answer 6

2mg +02->2mgo
with flame burns bright white, but can happen slowly n oxygen. therefore mg ribbon should be cleaned before reactions to remove thin layer of mgo

Question 7

mg with hcl

Answer 7

mg +2hcl->mgcl2 +h2

Question 8

mgo with hcl

Answer 8

mgo+2hcl->mgcl2 +h20

Question 9

magnesium hydroxide in water

Answer 9

insoluble

Question 10

mg(0h)2 with hcl

Answer 10

mg(0h)2 + 2hcl->mgcl2 +2h20

Question 11

calcium hydroxide in water

Answer 11

more alkaline than mg0h2, partly coluble

Question 12

barium hydroxide in water

Answer 12

v alklaine, v soluble, forms ba2+ and 20h-

Question 13

making strontium sulafte

Answer 13

srcl2 +na2so4-> srso4 +2nacl

Question 14

reaction of metal w sulfuric acid

Answer 14

makes metalso4 and hydrogen

as you go down reaction slower

Question 15

extraction of titanium using magnesium

Answer 15

1) tio2+2cl2+2c->ticl4 +2co at 900degrees
2) ticl4 fractional distillation
3) ticl4+2mg->ti+2mgcl2

Question 16

why is titanium expsenive

Answer 16

cost of mg, batch process, argn is used in fd and expsenive, high temps

Question 17

trends

Answer 17

sulfate solubility less as down group
hydroxide solubility more as down group
atomic radius increases as down 
mp decreases as down 
reactions w water more as down group