Question 2.2.1: Bond length is the average distance between the nuclei of two bonded atoms in a molecule.
Question 2.2.2: The bond length for the bond between the C and N atoms is longer than the bond length between the C and H atoms because nitrogen is larger than hydrogen, and hence the bond between C and N atoms is longer.
Question 2.2.3:
H-C≡N
Question 2.2.4: The bond order of nitrogen and carbon in hydrogen cyanide is 1.
Question 2.2.5:
- Bond order
- Presence of multiple bonds
Question 2.3:
2.3.1: NaCl
2.3.2: Polar
2.3.3: Tetrahedral
2.3.4: PCl5
2.3.5: Nonpolar
9/15
UCT ONLINE
HIGH SCHOOL
PHYSICAL SCIENCES
Question 2.2
During an investigation, to determine the bond length of different bonds in
hydrogen cyanide (HCN), the following results were obtained.
Bond length (nm)
Bonding atoms
Cand H
0,109
Cand N
0,116
Question 2.2.1 (2 marks]
Define bond Length.
Question 2.2.2 [2 marks]
Explain why the bond length for the bond between the C and N atoms is longer
than the bond length between the C and H atoms.
Question 2.2.3 [3 marks]
Draw the Lewis Diagram for hydrogen cyanide.
Question 2.2.4 [1 mark]
Write down the bond order of nitrogen and carbon.
Question 2.2.5 (2 marks]
List TWO factors, other than atomic size, that influence bond length.
Question 2.3 (7 marks]
Fill in the table by writing the question number with the correct answer.
Write only the question number and answer, e.g. 2.3.1. Molecules.
Chemical
formula
Substance
Type of bond Polarity of
Shape of
molecule
molecule
linear/none
Sodium
chlorate
polar
2.3.1
2.3.2
Phosphorus PC,
| 2.3.3
2.3.4
2.3.5
o 2019 Valenture Institute All Rights Reserved (not authorised for commercial use)
1 answer
1 answer