 |
 |
13 of 15 |  |
 |
 |
U-13
3.
Explain the difference in light intensity between the probe in the acetic acid solution and in the hydrochloric
acid solution. (0.5 marks)
Part II. Periodic Trends
1.
Explain the difference in acidity of MgO dissolved in water and of P
4
O
10
in water in terms of position of the
element in the periodic table and bonding. (0.5 marks)
2.
a)
N2O3 is one of the many oxides of nitrogen. If N2O3 is dissolved in water , predict whether
this would result in an acidic or basic solution. Explain. (0.4 marks)
b)
Predict which is more acidic (less basic), K2O or CaO? Explain. (0.4 marks)
3.
Explain the difference in physical states of the halogens in terms of their positions in the periodic table and
the relative strengths of their intermolecular forces. In your answer, correlate molecular size and
polarizability to physical state, and identify the primary intermolecular forces. (Refer to your text book for a
description of intermolecular bonding.) (1.0 mark)
