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Flashcards in Periodicity Deck (11):
1

State the trend in the solubility of the hydroxides of the group II metals.

Increases down group II.

2

State the trend in the solubility of the sulphates of the group II metals.

Decreases down group II.

3

State the trend in reactivity of haloalkanes.

Increases down group VII

4

What is observed when sodium reacts with oxygen?

What is the oxide formed?

Yellow flame

White solid formed

Na2O

5

What is observed when magnesium reacts with oxygen?

What is the oxide formed?

Bright white flame

White fumes

White solid formed

MgO

6

What is observed when aluminium reacts with oxygen?

What is the oxide formed?

Bright white flame

White solid

Al2O3

7

What is observed when silicon reacts with oxygen?

What is the oxide formed?

White solid

SO2

8

What is observed when phosphorus reacts with oxygen?

What is the oxide formed?

White flame

White fumes

P4O10

9

What is observed when sulphur reactions with oxygen?

What is the oxide formed?

Blue flame

Fumes

SO2 and some SO3

10

Why does Na2O form an alkaline solution when it reacts with water?

The O2- ion reacts with the water:

O2- + H2O → 2OH-

11

How does aluminium oxide reaction with:

  1. Acids
  2. Bases

Acids:

Al2O3 + 6H+ → 2Al3+ + 3H2O

Bases:

Al2O3 + 2OH- + 3H2O → 2[Al(OH)4]-