Uses of group 2 magnesium

Question 1

Magnesium hydroxide, Mg(OH)2, is partially soluble in

Answer 1

water

Question 2

Magnesium hydroxide, Mg(OH)2, is partially soluble in water and is used in suspension (known as ‘milk of magnesia’) to

Answer 2

to neutralise excess acid in the stomach and treat constipation

Question 3

Magnesium hydroxide, Mg(OH)2, is partially soluble in water and is used in suspension (known as ‘milk of magnesia’) to neutralise excess acid in the stomach and treat constipation

equation

Answer 3

Mg(OH)2 (s) + 2HCl (aq) → MgCl2 (aq) + 2H2O (l)

Question 4

It is safe to use as the magnesium hydroxide as is..

Answer 4

only partially soluble making the solution only slightly alkaline (pH ≅ 10) due to the low OH- concentration

Question 5

Magnesium is also used in the extraction of

Answer 5

titanium from its ore, TiO2

Question 6

TiO2 is heated in a stream of chlorine, in the presence of coke, to produce TiCl4

equation

Answer 6

TiO2 (s) + 2C (s) + 2Cl2 (g) → TiCl4 (g) + 2CO (g)

Question 7

The titanium is extracted from its chloride by reduction with

Answer 7

magnesium (sodium can also be used)

Question 8

The titanium is extracted from its chloride by reduction with magnesium (sodium can also be used) equation

Answer 8

TiCl4 (g) + 2Mg (l) → Ti (s) + 2MgCl2 (l)