structure kimia p2 f5
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1 Table 5.1 shows a result which are obtained when a student investigated the reaction
between 3.09 g of zinc granules and excess dilute sulphuric acid at 30oC .The gas
was collected and its volume is measured ever !0 seconds. Jadual 5.1 menunjukkan keputusan yang diperolehi bila seorang pelajar mengkaji
tindakbalas antara 3.09 g kepingan zink dengan asid sulfurik cair berlebihan pada
suhu 30o
C.as dikumpul dan isipadunya diukur setiap !0 saat.
Time"s 0 !0 #0 $0 %0 100 1!0 1#0 1$0
&ol"cm3 0 30 #% $# '# %! %% 90 90
Table 5.1
(se information from Table 5.1 to answer the following )uestions.
unakan maklumat dari Jadual 5.1 untuk menja"ab soalan berikut
*a+ Complete the diagram to show how the gas could be collected and its
volume measured.
#engkapkan rajah berikut untuk menunjukkan bagaimana gas dikumpuldan isipadunya disukat. .
, ! mar-s
5*a+
*b+ *i+ /raw the graph of volume of gas collected against the time on the graph paper provided based on the result at Table 5.1.
#ukiskan graf isipadu gas yang dikumpul mela"an masa diatas kertas
graf yang disediakan berdasarkan keputusan pada Jadual 5.1., 3 mar-s
5*b+*i+
1
inc
$ink
ulphuric acid
%sid sulfurik
!
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!
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*ii+ 2ased on the graph calculate the rate of reaction at #0 seconds.
how the tangent on the graph at *b+*i+ . &erdasarkan graf yang diplot' kira kadar tindakbalas pada masa (0
saat. )unjukkan tangen diatas graf pada *b+*i+.
, ! mar-s
5*b+*ii+
*c+ The above experiment is repeated using the same mass of zinc powder andexcess dilute sulphuric acid at the same temperature. -etch the graph of the
volume of gas produced against time on the same graph paper in *b+*i+.
,ksperimen diatas diulang menggunakan serbuk zink yang sama jisimnya dan
asid sulfurik cair yang berlebihan pada suhu yang sama . #akarkan graf isipadu gas yang dikumpul mela"an masa pada kertas graf yang sama pada
*b+*i+.
, ! mar-s
5*c+
*d+ 4xplain wh the rate of reaction decrease with time
)erangkan mengapa kadar tindakbalas berkurang dengan masa -
6666666666666666666666666666666..
6666666666666666666666666666666..
, 1 mar-
5*d+
Total 75
3
!
!
1
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8xidation
engoksidan
7luminium 8xide7l!83
%luminium o/ida' %l !3
:!*g+ " ;i " :eat
2 !*g+ 4i anaskan
2 /iagram $.1 shows the conversion of organic compounds from one homologous
series to another and its chemical properties. ajah 6.1 menunjukkan perubahan bagi sebatian organik dari satu siri homolog
kepada siri homolog lain dan sifat kimianya.
<<
/iagram $.1 ajah 6.1
*a+ *i+ ;ame the homologous series for propan=1=ol. 4amakan siri homolog bagi propan71ol.
6666666666666666666666666666......., 1 mar-
$*a+*i+
*ii+ /raw the structural formula for propan=1=ol
#ukiskan formula struktur bagi propan717ol
, 1 mar-
$*a+*ii+
*b+ >rite the chemical e)uation for conversion <)uliskan persamaan kimia bagi perubahan 8
6666666666666666666666666666666...
, ! mar-s
$*b+
#
?ropan=1=ol ropan717ol
:drocarbon @
2idrokarbon
Compound A
:ebatian ;
Carbon dioxide water
<arbon dioksida air
<
:drocarbon 2idrokarbon $
1
!
1
7luminium oxide 7l!83
%luminium oksida' %l !3
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*c+ ;ame compound A
4amakan sebatian ;
6666666666666666666666666666666...
, 1 mar-
$*c+
*d+ *i+ ;ame the reaction for conversion <<
4amakan tindak balas bagi perubahan 88
66666666666666666666666666666...
, 1 mar-
$*d+*i+
*ii+ /raw the set= up of apparatus that can be used in conversion <<.
. #ukiskan susunan radas yang boleh digunakan perubahan 88.
, ! mar-s $*d+*ii+
5
1
1
!
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*e+ :exene and hexane are compounds in the same homologous series ashdrocarbon @ and hdrocarbon .
/iagram below shows the burning of hexene and hexane in air.
2eksena dan heksana adalah sebatian dalam siri homolog yang sama sepertihidrokarbon dan hidrokarbon $
ajah di ba"ah menunjukkan pembakaran heksena dan heksana dalam udara
Compare the sootiness of hexane and hexene. 4xplain.
&andingkan kejelagaan bagi heksana dan heksena. )erangkan.
66666666666666666666666666666666
66666666666666666666666666666666
, ! mar-s
$*e+
Total 7$
$
?orcelain dish =angkuk pijar
Bilter paper <ertas turas
oot
Jelaga
:exane
2eksana
:exene
2eksena
!
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Section B * !0 mar-s +
*Choose either 3 or #+
3. * a + Bried rice stored in a refrigerator lasts longer than fried rice stored in a -itchen
cabinet. 4xplain wh. * # mar-s +
* b+ 7 group of pupils carried out three experiments to investigate the factors
affecting the rate of a reaction.
Table ' shows information about the reactants and the temperature used in each experiment.
Experiment Reactants Temperature /
ºC
< 4xcess zinc granules and !5 cm of 0.5 mol dm=3 hdrochloric acid
30
<< 4xcess zinc granules and !5 cm of 0.5 mol dm=3
hdrochloric acid
#0
<<< 4xcess zinc powder and !5cm of 0.5 mol dm=3 hdrochloric acid
#0
TABLE 7
The graph shows the result of these experiments.
'
10 30 #0 50 $0!0
!5
50
Time*s+
&olume of gas
collected *cm3+
<<<
<
<<
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* i + Calculate the average rate of reaction for 4xperiment <. , ! mar-s
* ii + 2ased on the table and graph compare the rate of reaction between D
4xperiment < and <<
4xperiment << and <<<
<n each case explain the difference in rate of reaction with reference to thecollision theor. ,10 mar-s
* iii + The chemical e)uation below shows the reaction between zinc and
hdrochloric acid.
n !:C1 nC1! :!
Eiven that the relative atomic mass of n F $5 and the molar volume of an gasis !# dm mol= at room conditions.
Calculate the maximum volume of hdrogen gas produced in 4xperiment <<<.
, #
mar-s
4 *a+ *i+ .>hat is the functional group of al-enes
*ii+ >rite the molecular formula and the name for the fourth member of
al-enes.
*iii+ 2ased on our answer in *a+ *ii+ draw the structural formulae of three possible isomers.
, $ marks
*b+ The flow chart below shows the chemical conversion of propan=1=ol to gas A
and then gas A to gas @.
*i+ >ith the help of suitable diagrams describe a laborator experiment to prepare gas A from the dehdration reaction of propan=1=ol.
<n our answer include the chemical e)uation and explanation on how toensure that gas A is alread produced.
, 10 marks
*ii+ ;ame gas @.Eas A burns with a more soot flame than gas @. 4xplain wh.
Eiven that the relative atomic mass of C F 1! and : F 1.
%
hdrogenation?ropan=1=ol Eas A
dehdrationEas @
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