Inorganic Chemistry Answers

2. (a) Explain what is the valence electron is and why the Lewis symbol for an atom

only accounts for electrons in the valence shell of the atom.

(b) Sketch the Lewis Dot Structure for each of the following compounds and

state the molecular geometry.

i. BeF2

ii. BCl3

iii. CCl4

iv. PBr5

(c) What is the octet rule and how it is achieved?

1. A reaction to convert ammonia into nitric acid involves following chemical

equation:

4 NH3 (g) + 5 O2 (g)à 4 NO(g) + 6 H2O(g)

Assume that 1.50 g of NH3 reacts with 2.75 g O2, then:

(a) Determine the limiting reactant.

(b) Calculate how many grams of NO and H2O will form in the reaction above.

(c) Calculate how many grams of the excess reactant will remain after the

reaction is complete.

(d) If the yield obtained for NO is 1.80 grams and yield obtained for H2O is 1.50

grams, calculate the percent yield of NO and H2O in this reaction.

(Atomic mass of N = 14 ; O = 16 ; H = 1)

(a) Sketch the s orbital and the 3 types of p orbitals.

(b) Which of the quantum numbers govern,

i. the shape of an orbital?

ii. the energy of an orbital?

iii. the spin properties of the electron?

iv. the spatial orientation of the orbital?

(c) Write the electron configuration for the following elements in the ground

state.

i. P and P3- (atomic number =15).

ii. Ca and Ca2+ (atomic number =20).

(d) If n = 3, find the

i. angular Momentum Quantum Number, l

ii. subshell designation.

iii. magnetic Quantum number, ml

iv. number of orbitals in subshells.

A closed gas cylinder contains 0.500 mol H2, 0.300 mol O2, 1.200 mol CO2 at a

temperature of 25 °C and a pressure of 2.00 atm.

i. Explain Dalton’s Law of partial pressure.

ii. Calculate the volume of the cylinder.

iii. Calculate the partial pressure of O2 in the container.

The Ideal Gas Law equation is derived from the three gas laws. Explain the

THREE gas laws by providing mathematical equations showing the

relationship between the relevant quantities.

discuss the industrial preparation of hydrogen by the steam reformer process which use light hydrocarbons

Describe how you will determine concentration of tryptophan in grains of soy bean harvested from field fertilised with NPK 15-15-15 using UV/VIS spectroscopy

what volume of 0.165 m HCIO4 must be added to 250ml of 0.286 m sodium mandelate na to produce a buffer solution with ph 3.89

[Fe(H2O)6]2+ reacts with Cl2 to form orange brown solution(A) and then with NaOH to produce an orange brown precipitate(B). Identify formulas of A and B

 what are the equations for the first and second ionisation energies of barium