Inorganic Chemistry For Mls Question Paper

Inorganic Chemistry For Mls

Course:Bachelor Of Science In Medical Laboratory Science

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE (MEDICAL LABORATORY SCIENCES)

HML 109: INORGANIC CHEMISTRY FOR MLS

DATE: Monday 28th December, 2009

TIME: 11.00 a.m – 1.00 p.m

The periodic table is provided

INSTRUCTIONS:

Answer ALL Questions.
Q1.
a)
Explain the term ‘molarity ’ as used in chemistry.
[2 marks]
b)
25cm3of a sodium carbonate, Na2CO3, solution required 15 cm3of 0.1M
hydrochloric
acid
to
reach the end–point. Determine the mass of sodium
carbonate
required
to
make 0.5litres of the solution.

( Na = 22.99 , C = 12.011, O = 15.9994)

[5 marks]
c)
Balance the redox equation
Mn O - + Fe 2+ + H+ ? Mn 2+ +Fe3+ + H O

[4 marks]
4
2

d)
Give the values of the quantum numbers associated with the following
orbital:

i) 2s

[2
marks]
ii)
3p

[2
marks]
iii)
4d

[2
marks]
e)
Give the electron configurations of the following species:
a. Ca

[2 marks]
b. Mn

[2 marks]
f)
Explain the concept of ‘orbital’

[2 marks]
g)
State the Pauli Exclusion of principle.

[2 marks]

Page 1 of 2

Q2.
a)
In the hydrogen atom, the energy of transition in m-1units is given thus:
1
? 1
1 ?

7
1
= 1.097 10
-
x
?
?
-
m
2
2 ??
?
? n
n
1
2 ?
Determine the frequency of the electromagnetic radiation emitted when an
electron jumps from the n=4 level to the n=2 level. (c = 2.998 x 1010cms-1).

[4 marks]

b)
State with reasons, whether the following quantum numbers are acceptable
or not:
n
l
m

s
i)
3
0
0
+½
[1
mark]
ii)
1
0
½ -
½
[1
mark]
iii)
4
3
-1
+½
[1
mark]
Q3.
a)
Outline the stages involved in the formation of calcium bromide,

Ca2+2Br-, from calcium metal and gaseous bromine.
[4 marks]

b)
Give three properties of ionic compounds.

[3 marks]
c)
Explain
the
term
‘acid’. [2
marks]
Q4. a) Explain
the
variation of atomic size across a period.
[2 marks]
b)
The first ionization energy of phosphorous is 1.76 x 10-18 Joule per atom
while that for sulfur is 1.66x10-18 Joule per atom. Explain. [2 marks]
c)
State
Hess’s
law.
[2
marks]
d)
The pH of an acid solution is 3.5. Determine the hydrogen ion
concentration of the solution.

[3 marks]

Page 2 of 2

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