Oxides, Chlorides and Hydrides
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Are metal oxides basic or acidic?
Are non-metal oxides basic or acidic?
What does it mean when an oxide is amphoteric?
It exibits both acidic and basic qualities
Give an example of an amphoteric oxide
- Aluminium oxide
- Beryllium oxide
The salt produced in the reaction between Al2O3 and NaOH is sodium aluminate - NaAlO2. What is a common use of this salt?
It is used as a drying agent
What kind of structure will Na2O, MgO and Al203 have?
What kind of structure will SiO2 have?
Covalent network (similar to diamond)
What kind of structure will P2O5, SO2 and Cl2O have?
When ionic chlorides are dissolved in water to they react?
No, they are soluble but do not react.
When covalent chlorides dissolve in water do they react?
What gas is produced when covalent chlorides are hydrolysed in water?
White fumes of HCl (hydrogen chloride)
Is aluminium chloride hydrolysed in water? What does this suggest about the character of the molecule?
Yes. This suggsets it has mainly covalent character
What happens to carbon chloride when it is put in water? Why?
In is immiscible in water and does not react to produce white fumes of HCl. This is because although it has four polar C-Cl bonds it is an overall non-polar molecule because of its tetrahedral shape and symmetry.
What ion do most ionic hydrides posses?
The hydride ion H -
Does the hydride ion act as an oxidising or reducing agent?
On reaction with water what do ionic hydrides produce?
Hydrogen gas and the hydroxide ion (OH - )
Electrolysis of molten ionic hydrides produces ______ gas at the positive electrode?
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