Group 2 Metals Review Flashcards

Flashcards to review the reactions and properties of Group 2 metals for exam preparation.

What happens when Group 2 metals burn in oxygen?

They form a metal oxide.

How does Beryllium react with oxygen?

Beryllium reacts with oxygen in powder form due to a thin layer of beryllium oxide inhibiting the reaction.

What is the appearance of Magnesium when it burns in oxygen?

Magnesium burns in oxygen with a bright white flame.

What color is the flame when Calcium burns in oxygen?

Calcium burns with a bright white flame which is slightly red at the top.

How does Strontium burn in oxygen?

Strontium is reluctant to start burning but burns intensely with a white flame.

What type of flame does Barium produce when it reacts with oxygen?

Barium burns in oxygen with a white flame.

How does Beryllium react with water?

Beryllium reacts with steam only at very high temperatures.

What happens when Magnesium reacts with cold water?

Magnesium has a very slight reaction with cold water, which stops due to the production of an insoluble coat of magnesium hydroxide.

Is the reaction between Magnesium and steam more vigorous than with cold water?

Yes, Magnesium burns in steam more readily than cold water.

Which Group 2 metals react in cold water?

Calcium, Strontium, and Barium all react in cold water.

How does reactivity change as you go down Group 2 when metals react with cold water?

Reactivity increases down the group.

What happens when Group 2 metals react with dilute hydrochloric acid?

They produce a metal chloride and hydrogen gas.

Does the reaction of Group 2 metals with dilute hydrochloric acid become increasingly vigorous as you go down the group?

Yes, the reactions get more vigorous as you go down the group.

What products are formed when dilute sulfuric acid reacts with Group 2 metals?

Metal sulfate and hydrogen.

Why don't the reactions with dilute sulfuric acid get more vigorous down the group?

Due to the solubility of the sulfates produced.

Which Group 2 oxide does not react with water?

Beryllium oxide.

What happens when Group 2 oxides react with water?

They produce hydroxides.

What products are formed when Group 2 oxides react with dilute acids?

Salt and water.

Do Group 2 hydroxides react with water?

No, Group 2 hydroxides do not react with water.

How do Group 2 hydroxides react with dilute acids?

In the same way as metal oxides, producing a salt and water.

Are Group 2 metal carbonates soluble in water?

No, they are insoluble.

What happens when Group 2 carbonates react with dilute acids?

They produce a salt, water, and carbon dioxide.

What are the products of thermal decomposition of Group 2 nitrates?

A metal oxide, oxygen, and nitrogen dioxide.

What are the observations during thermal decomposition of Group 2 nitrates?

The nitrate and oxide are white solids, and nitrogen dioxide is a brown gas.

What are the products of thermal decomposition of Group 2 carbonates?

A metal oxide and carbon dioxide.

How does the stability to heat change for Group 2 carbonates and nitrates as you go down the group?

They become more stable to heat.

What general trend is observed in the reactions of Group 2 metals as you go down the group?

Reactivity increases.

Why does reactivity increase down Group 2?

Ionisation energy decreases due to increasing atomic radius and the shielding effect of electrons.

How does the solubility of Group 2 hydroxides change as you go down the group?

Solubility increases.

How does the solubility of Group 2 sulfates change as you go down the group?

Solubility decreases.

Name two Group 2 compounds used in agriculture.

Calcium hydroxide and calcium carbonate.

Why is calcium hydroxide added to soil?

To bring the pH to 6, which is the best condition for crops to grow when the soil is too acidic.