Reactions of non-metal/metal oxides with water Flashcards
1
Q
- What is the solubility of the oxide: Oxide of potassium + water
- Colour of the indicator in the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- Highly soluble
- Purple violet
- Alkaline
- Potassium Hydroxide
2
Q
- What is the solubility of the oxide: Oxide of carbon + water
- Colour of the indicator in the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- Soluble
- yellow
- weakly Acidic
- Carbon dioxide
3
Q
- What is the solubility of the oxide: Oxide of Iron + water
- Colour of the indicator is the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- Insoluble
- Green [due to distilled water]
- Neutral
- N/A
4
Q
- What is the solubility of the oxide: Oxide of magnesium + water
- Colour of the indicator is the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- Forms an suspension
- Blue
- Alkaline
- Magnesium Hydroxide
5
Q
- What is the solubility of the oxide: Oxide of Sulphur + water.
- Colour of the indicator is the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- soluble
- red
- Acidic
- Sulphurous acid
6
Q
- What is the solubility of the oxide: Oxide of Sodium + water
- Colour of the indicator is the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- Insoluble
- Blue
- Alkaline
- Sodium Hydroxide
7
Q
- What is the solubility of the oxide: oxide of phosphorus + water.
- Colour of the indicator is the solution [universal indicator]
- Is the new substance ACIDIC or ALKALINE?
- Name of the product
A
- Soluble
- red
- Acidic
- Phosphoric acid
8
Q
When a non-metal oxide and water react they form a/n?
A
Acid
9
Q
Non-metallic oxides in solution are?
A
Acidic
10
Q
All metal oxides in solution form?
A
Bases
11
Q
When a metal oxides and water react, they from?
[apart from a metal hydroxide]
A
an alkali
12
Q
When a non-metal oxide and water react, they form?
[apart from non-metal hydroxide]
A
An acid
13
Q
How is rust formed?
A
When iron metal, O2 and water moisture react to form a complex compound called rust.
14
Q
Rusting can only occur where?
A
At the surface of the iron there it is exposed to air
15
Q
Give two ways to prevent rusting
A
- Paint it to create a barrier between the surface of the metal and oxygen and moisture.
- Can be coated with with a thin layer of zinc [metal which do not rust.]- this is done by a process called galvanising.