Non-Metal Oxides and Metal Oxides
Non-Metal Oxides and Metal Oxides
When non-metals react with oxygen they form non-metal oxides , if these then dissolve in water they form acidic solutions.
Complete the table below:
Name of Oxide Appearance of
Oxide
Effect on Universal
Indicator
carbon dioxide colourless gas sulphur dioxide nitrogen dioxide colourless gas brown gas
When metals react with oxygen they form metal oxides , if these then dissolve in water they form alkaline solutions.
Complete the table below:
Name of Oxide Appearance of
Oxide
Effect on Universal
Indicator
sodium oxide white solid calcium oxide white solid magnesium oxide white solid
All acids can conduct electricity. When they do this hydrogen gas is always formed at the negative electrode , this tells us that all acids contain aqueous hydrogen ions (H +
(aq)
)
Try the following questions:
1. The pH scale is
A.
any whole number from 1 to 14
B.
any whole number from 0 to 14
C.
any whole number from below 0 to above 14
D.
any number from below 0 to above 14
2. Which of the following pH values represents an acidic solution?
A.
3
B.
7
C.
10
D.
14
3. Which of the following pH values represents a neutral solution?
A.
2
B.
7
C.
9
D.
11
4. Which of the following pH values represents an alkaline solution?
A.
1
B.
4
C.
7
D.
12
5. Which of the following oxides would dissolve in water to produce an acidic solution?
(You may wish to consult your data booklet)
A.
sulphur dioxide
B.
iron (III) oxide
C.
copper (II) oxide
D.
sodium oxide
6. Which of the following oxides would dissolve in water to produce an alkaline solution?
(You may wish to consult your data book)
A.
sulphur dioxide
B.
iron (III) oxide
C.
copper (II) oxide
D.
sodium oxide
7. Which of the following oxides would dissolve in water to produce a neutral solution?
(You may wish to consult your data book)
A.
NO
2
B.
H
2
O
C.
Li
2
O
D.
SO
2
8. Which of the following gases would dissolve in water to produce an alkaline solution?
A.
Carbon dioxide
B.
Nitrogen dioxide
C.
Ammonia
D.
Methane
9. Which of the following household substances is alkaline?
A.
Lemon juice
B.
Oven cleaner
C.
Vinegar
D.
Pure water
10. Which of the following household substances is acidic?
A.
Lemon juice
B.
Oven cleaner
C.
Indigestion remedy
D.
Toothpaste
