0).eating of copper!!" carbonate and confirmator& test for carbon dioxide ACIDS .BASES / SALTS 0) .eating of carbonate compound and confirmator& test for carbon dioxide 1) Preparation of soluble salt Method !" 4 Sodium nitrate 1) Preparation of soluble salt Method ! 2 !!" 3) Preparation of insoluble salt 3)Preparation of soluble salt Method !!" 4 Copper!!" sulphate
5) Preparation of insoluble salt 4 Lead!!" iodide
'able 0 sho$s three elements , M, 9 and : and their proton number and nucleon number respecti(el&) Ele#e+% M 9 :
P"o%o+ +(#be" 3 00 0
N(cleo+ +(#be" B 13
Table 2 a" State the nucleon number of : if the number of neutron is 1;)
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<) = 0 mark > b"
i" ?hat is the number of electron in an atom M@
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<) = 0 mark > ii" ?rite the electron arrangement for atom 9)
)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 0 mark > iii" ?hat is the group of the abo(e elements@ c "
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<) = 0 mark > State t$o ph&sical properties of the elements abo(e)
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 1 marks > d"
!n an experiment, an element M $as burnt and put into a gas Aar of chlorine gas) 'he experiment $as repeated b& using an element 9) i"
?rite the equation for the reaction bet$een element M and chlorine gas)
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 0 mark > Compare the reacti(it& of reaction bet$een element M and element 9 $ith chlorine gas) xplain &our ans$er)
ii"
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< <<<<<<)<<<<<<<<<<<<<<<<<<<<<<<<< = 3 marks >
13
Figure 1 sho$s part of the Periodic 'able of lements) 0
P
1
3
5
E
00
01
03
Q
B
05
0E
0
R
0;
0B
0
Figure 1
a"
P and # react to form a compound)
)
i" State the t&pe of compound formed) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<)))))))) = 0 mark > ii" Dra$ the electron arrangement for the compound formed)
= 1 marks > iii"
?rite the chemical equation for the reaction bet$een P and #) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 0 mark >
i("
'he compound formed can conduct electricit& in aqueous and molten state) xplain $h&@ <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 0 mark >
b" : and # also react to form a compound) i"
State the t&pe of bond formed)
ii"
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<) = 0 mark > ?rite the formula for the compound formed)
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 0 mark >
iii"
Dra$ the electron arrangement for the compound formed)
= 1 marks > i("
State one ph&sical propert& of the compound) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 0 mark >
4
a"
'able 5 sho$s three elements and their proton number respecti(el&) Ele#e+% Carbon Sodium Chlorine
P"o%o+ +(#be" 00 0B '-8L 5
Hsing the information in the 'able 5 , explain ho$ i" ii"
ionic bond and co(alent bond formed)
b"
=03 marks>
Describe an experiment to differentiate ionic compound and co(alent compound in terms of electrical conducti(it&) =B marks>
5
a"
'ransition elements are elements from Group 3 to Group 01 of the Periodic 'able) i" 9ame t$o transition elements) ii"
State four characteristics of transition elements)
= marks> b"
lement M has 0 of proton number) State the Group and 'he Period of element M in Periodic 'able) xplain &our ans$er =E marks>
6 a" - pupil carried out an experiment to in(estigate the chemical changes that occur to barium chloride as a result of reaction P) 'he result of the experiment is sho$n in diagram E
Diagram 5
i" 'he chemical equation for reaction P is as follo$sI 8aCl1 J 9a1SK5 8aSK5 J 19aCl xcess sodium sulphate is added to E; cm 3 of ;)E mol dm3 barium chloride) Gi(en the molecular mass of 8aSK5 6 133
i" calculate the mass of barium sulphate formed) = 3 marks >
ii" Describe the experiment ho$ to ma+e the dr& barium sulphate in the laborator&) =B
marks
>
KERTAS 4 2
Metals are arranged in the Electrochemical Series based on the potential difference between two metals.
Figure )0 sho$s the setup of apparatus to determine the order of metals in the lectrochemical Series)
V
copper as the positive terminal in all cells
_
+
Metal X plate
)opper plate
)opper*$$+ sulphate solution #$%&RE '.,
Figure )1 sho$s the readings of the (oltmeter $hen different metals $ere used as 7)
2
1
3
0
2
1
3
0
Volt
Volt
Cell I When magnesium was used as metal
Cell II When lead was used as metal
Cell III When iron was used as metal
Potential difference ! """ V
2
1
Potential difference ! """ V
2
1 3
0
3
0
Volt
Volt
Cell IV When zinc was used as metal
Cell V When copper was used as metal
Potential difference ! """ V
3
0
Volt
Potential difference ! """ V
2
1
Potential difference ! """ V
#$%&RE '.(
a" #ecord the (oltmeter readings potential difference" for each cell in the space pro(ided in Figure )1) = 3 marks>
b" Construct a table and record the pairs of metals and potential difference for this experiment)
= 3 marks>
c" Complete 'able )3 based on the experiment) Na#e o$ 8a"iables
Ac%io+ %o be %a9e+
i" Manipulated (ariable I
i" 'he $a& to manipulate (ariable I <<<<<<<<<<<<<<<<<<<)))
<<<<<<<<<<<<<))) <<<<<<<<<<<<<<<<<<<))) ii" #esponding /ariable I
ii" ?hat to obser(e in the responding (ariable I
<<<<<<<<<<<<<)))
<<<<<<<<<<<<<<<<<<<))) <<<<<<<<<<<<<<<<<<<)))
iii" Controlled (ariable I
iii" 'he $a& to maintain the controlled (ariable I
<<<<<<<<<<<<<)))
<<<<<<<<<<<<<<<<<<<))) <<<<<<<<<<<<<<<<<<<)))
-/0E '.1
= marks>
d" 8ased on Cell I in Figure )1, i" ?hat $ould &ou obser(e at magnesium plate@
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 3 marks>
ii" ?rite the half equations of the reaction ta+ing place at the copper plate)
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< = 3 marks> e" ?h& the (oltmeter reading for Cell : is ;); /@
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<)) = 3 marks> f" 8ased on potential differences in Figure )1, arrange copper, magnesium, lead, iron and zinc in descending order of electropositi(it& of metal)
Descending order of electropositi(it&
= 3 marks>
1 - student is gi(en an ionic compound and co(alent compound N)
Hsing the suitable materials and apparatus, plan a labotar& experiment to compare the electrical conducti(it& bet$een the compounds of and N) Nour explaination should include all the follo$ingsI a" b" c" d" e" f"
Statement of the problem .&pothesis -ll the (ariables List of materials and apparatus Procedure 'abulation of data = 0B marks >
