STUDENT NAME: ______________________________ CLASS: _____

MICHIRU VIEW SECONDARY SCHOOL

2022 MALAW SCHOOL CERTIFICATE OF EDUCATON MOCK

EXAMINATIONS

CHEMISTRY
PAPER II (Practical)
(40 marks)
Subject Number 038/MII

Date: Thursday 30 May 2022 Time allowed: 1 𝟏⁄𝟐hours

Instructions

1. This paper contains 6 pages of 4 Question Tick if Do not write in these

number answered columns
questions. please check
2. Answer all the questions.
1
3. Write your name and class on all the
2
pages of this paper
3
4. On the table alongside, tick against the 4
question number you have answered Total

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STUDENT NAME: ______________________________ CLASS: _____
1. In an experiment to investigate change in mass of reactants with time, a student mixed 1.8g of small
marble chips (CaCO3) and 40 cm3 of 2.0 M hydrochloric acid. The results were recorded in the table
below.
Table of results
Time(s) Loss of mass(g)
20 0.15
40 0.28
60 0.53
80 0.60
100 0.62
140 0.63
180 0.63

a. Write down a balanced chemical equation of the reaction

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(2 marks)

b. Use the data in the table of results to plot a graph of loss in mass against time taken on the graph
paper provided.
(5 marks)
c. Use the graph in 2b to describe the rate of reaction of HCl and CaCO 3 from 0 seconds to 180
seconds.
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STUDENT NAME: ______________________________ CLASS: _____

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STUDENT NAME: ______________________________ CLASS: _____
2. A new brand of body lotion is causing a skin rush unlike the old brand of the same lotion. With the aid of a well
labelled diagram, describe an experiment that could be done to isolate the pigment that is causing the skin rush.

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(12 marks)

3.You are provided with a cell,a bulb, a beaker, 2 nails, connecting wires and 40 ml of different liquids labelled J,K,L
and M

a. Setup the apparatus as shown below:

b. Pour 40 ml of liquid J into the beaker

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STUDENT NAME: ______________________________ CLASS: _____
c. Dip the nails into the liquid
d. Observe the bulb and record “light” or “no light” in the appropriate space inn the table of results
e. Remove the nails from the beaker
f. Rinse the beaker and the nails with distilled water
g. Repeat steps b to f using liquids K,L and M
Liquid observation
J
K
L
M
(4 marks)
h.Classify the liquids as ionic or covalent

Ionic: __________________________________________________________________
Covalent:_______________________________________________________________
(4 marks)
4. You are provided with Burette, Funnel, measuring cylinder, Beaker, Clamp, Stand, 0.1M NaOH,
Phenolphthalein indicator, white tile or paper and Hydrochloric acid (HCl) of unknown concentration.
a. Set up the apparatus as shown below.

b. Fill the burette with Hydrochloric acid (HCl) to the zero mark.
c. Pour 10ml of Sodium hydroxide into a beaker.
d. Add a drop of Phenolphthalein indicator to the Sodium hydroxide; note the colour change.
e. Slowly add Hydrochloric acid from the burette to sodium hydroxide, shaking the beaker all the time
until pink colour disappears.
f. Empty the beaker and rinse it with distilled water
g. Repeat the procedure c to e note and record volume of Hydrochloric acid used in the table of results
below.
Table of the results

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STUDENT NAME: ______________________________ CLASS: _____
Run 1 Run 2
Final Volume of HCl in (ml)
Initial Volume of HCl in (ml)
Average Volume (ml)
(5 marks)

I. Calculate the concentration of Hydrochloric acid (HCl) solution.

(3 marks)

II. State any two ways of expressing molarity/concentration.

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(2 marks)

END OF QUESTION PAPER

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