Group 2 Metals

Question 1

Why as you go down group 2 do their hydroxides reactions become more vigorous

Answer 1

As there is more shielding hence the outer electron is further from the nucleus weaker attraction between the nucleus and the outer electrons so the electrons are lost more easily

Question 2

As you go down the group what is seen between the reaction between group 2 metals and hydroxides

Answer 2

More vigorous fizzing
reactions warming up quicker
less precipitate formed

Question 3

Reaction of magnesium and steam

Answer 3

Mg(s) + H2O(g) = MgO(s) + H2(g)

Question 4

How does the reaction with Mg differ to the reaction with steam

Answer 4

Mg with water is a very slow reaction while My with steam is a very fast reaction

Question 5

Trend of solubility and pH group 2 metal hydroxides as you go down the group

Answer 5

Increases solubility and pH increases

Question 6

Reaction of MgCl2 and NaOH

Answer 6

MgCl2 + 2NaOH —> Mg(OH)2 + 2NaCl
Mg2+ + 2OH- —> Mg(OH)2

Question 7

Trend of solubility in water of metal group 2 sulfates as you go down the group

Answer 7

Decrease in solubility

Question 8

Test for sulfate ions

Answer 8

Add acidified Barium Chloride
white ppt formed

Question 9

Why is acid used HCl or HNO3

Answer 9

To remove the carbonate which would interfere with the reaction

Question 10

Test for barium ions

Answer 10

Sulfuric acid or any soluble sulfate salt

Question 11

Uses of Mg and give equation

Answer 11

Used as a reducing agent to extract titanium from its ore
TiO2 + 2Cl2 +2C —> TiCl4 + 2CO
TiCl4 + 2Mg —> Ti + 2MgCl2