Dear CH304
There are two questions in today's assignment. Please copy question 1 and answer it on a piece of writing paper. Submit you answers before Tuesday's assembly.
Question 1 - Done in writing paper.
(a) Draw the dot and cross diagrams of (i) N2O (ii) O3 (iii) HNO3 (iv) H3PO4.
[Hint: (iii) and (iv) are mineral acids. As they are mineral acids they have at least one O-H.]
(b) Draw the lewis structure of H2O2. On this diagram, label all bond angles. In addition, determine the shape of H2O2.
(c) XeF2 is one of the most stable Xenon compounds. (i) Draw the dot and cross diagram of XeF2. (ii) Predict with explanation which bond is stronger Xe-F or He-F.
(d) Suggest an explanation for the following suitations. (i) MgCl2 has stronger interatomic bonds than NaCl. (ii) Given that the bond energy of C-Cl is 328 kJmol-1 and while the C-N is 292 kJ mol-1.
[Marks allocation for Q1: 3 + 4 + 4 + 4]
There are two questions in today's assignment. Please copy question 1 and answer it on a piece of writing paper. Submit you answers before Tuesday's assembly.
Question 1 - Done in writing paper.
(a) Draw the dot and cross diagrams of (i) N2O (ii) O3 (iii) HNO3 (iv) H3PO4.
[Hint: (iii) and (iv) are mineral acids. As they are mineral acids they have at least one O-H.]
(b) Draw the lewis structure of H2O2. On this diagram, label all bond angles. In addition, determine the shape of H2O2.
(c) XeF2 is one of the most stable Xenon compounds. (i) Draw the dot and cross diagram of XeF2. (ii) Predict with explanation which bond is stronger Xe-F or He-F.
(d) Suggest an explanation for the following suitations. (i) MgCl2 has stronger interatomic bonds than NaCl. (ii) Given that the bond energy of C-Cl is 328 kJmol-1 and while the C-N is 292 kJ mol-1.
[Marks allocation for Q1: 3 + 4 + 4 + 4]
Suggested Solutions
Comments(1) Becareful with your explanation in (c)(ii) - It cannot be a contradiction.
(2) Becareful with your explanation in (d)(ii) - It cannot contradict the given data. Hence, atom size for effective overlap isn't suitable. Lone pair repulsion is irrelevant as C does have that.
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