Latihan Elektrokimia
3
SKOR A KIMIA TAJUK: SEL KIMIA SET 1 Diagram 2.1 shows the set-up of the apparatus for an experiment to construct the Electrochemical Series through the ability of metals to displace other metals from their salt solution. Rajah 2.1 menunjukkan susunan radas bagi satu eksperimen untuk membina Siri Elektrokimia berdasarkan kebolehan logam untuk menyesarkan logam lain daripada larutan garamnya The experiment was repeated using silver, copper and P metals to replace zinc and P nitrate solution to replace silver nitrate solution. Table 2.2 shows the result obtained. Eksperimen ini diulang dengan menggunakan plat argentum, plat kuprum dan plat logam P untuk menggantikan plat zink, larutan P nitrat untuk menggantikan larutan Argentum nitrat. Experiment Eksperimen Metal Logam Silver nitrate solution Larutan Argentum nitrat P nitrate solution Larutan P nitrat I Zinc Zink Silver metal is displaced. Logam argentum disesarkan P metal is displaced. Logam P disesarkan II Copper Kuprum Silver metal is displaced. Logam argentum disesarkan No reaction. III P Silver metal is displaced. Logam argentum disesarkan Table 2.2/Jadual 2.2 (a) What is meant by Electrochemical Series? Apakah yang dimaksudkan dengan Siri Elektrokimia ...................................................................... .................................................................. [1 mark] (b) Based on the results in Table 2.2, arrange the metals silver, copper, P and zinc in ascending order of electropositivity. Berdasarkan kepada keputusan di dalam Jadual 2.2, Susunkan argentum, kuprum, P dan zink berdasarkan kelektropositifan secara menaik Silver nitrate solution Larutan argentum nitrat Zinc plate Plat zink Diagram 2.1/Rajah 2.1
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elektrokimia
Transcript of Latihan Elektrokimia
SKOR A KIMIA TAJUK: SEL KIMIASET 1Diagram 2.1 shows the set-up of the apparatus for an experiment to construct the Electrochemical Series through the ability of metals to displace other metals from their salt solution.Rajah 2.1 menunjukkan susunan radas bagi satu eksperimen untuk membina Siri Elektrokimia berdasarkan kebolehan logam untuk menyesarkan logam lain daripada larutan garamnya
The experiment was repeated using silver, copper and P metals to replace zinc and P nitratesolution to replace silver nitrate solution.Table 2.2 shows the result obtained.Eksperimen ini diulang dengan menggunakan plat argentum, plat kuprum dan plat logam P untuk menggantikan plat zink, larutan P nitrat untuk menggantikan larutan Argentum nitrat.
Experiment
Eksperimen
Metal
Logam
Silver nitrate solution
Larutan Argentum nitrat
P nitrate solution
Larutan P nitrat
IZincZink
Silver metal is displaced.Logam argentum disesarkan
P metal is displaced. Logam P disesarkan
IICopperKuprum
Silver metal is displaced.Logam argentum disesarkan
No reaction.
III PSilver metal is displaced.
Logam argentum disesarkanTable 2.2/Jadual 2.2
(a) What is meant by Electrochemical Series?Apakah yang dimaksudkan dengan Siri Elektrokimia
........................................................................................................................................[1 mark]
(b) Based on the results in Table 2.2, arrange the metals silver, copper, P and zinc in ascending order of electropositivity.Berdasarkan kepada keputusan di dalam Jadual 2.2, Susunkan argentum, kuprum, P dan zink berdasarkan kelektropositifan secara menaik
[1 mark]
(c) Name the suitable metal P.Namakan logam yang mungkin bagi P
…………………………………………………………………………………….. [1 mark]
More electropositiveKereaktifan bertambah
Diagram 2.1/Rajah 2.1
Zinc platePlat zink
Silver nitrate solutionLarutan argentum nitrat
(d) Based on Experiment I :Berdasarkan Eksperimen 1
(i) Zinc can displace silver metal from silver nitrate solution. Explain why.Zink boleh menyesarkan logam argentum daripada larutan argentum nitrat. Terangkan mengapa.
…………………………………………………………………………………… [1 mark]
(ii) Write the chemical equation for the reaction.Tuliskan persamaan kimia bagi tindakbalas di d(i)
…………………………………………………………………………………… [2 mark]
(iii) What is the change in the oxidation number of zinc?Apakah perubahan nombor pengoksidaan bagi zink?
…………………………………………………………………………………… [1 mark]
(e) Diagram 2.3 shows the set up of apparatus for the reaction between metal P and copper(II) nitrate solution.Rajah 2.3 menunjukkan susunan radas bagi tindakbalas anatara logam P dengan larutan kuprum(II)nitrat
Diagram 2.3/Rajah 2.3
What is the colour change of the of copper (II) nitrate solution?. Explain why.Apakah yang dapat diperhatikan pada warna larutan kuprum(II) nitrat. Terangkan mengapa
…………………………………………………………………………………………..
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(f) State two uses of the Electrochemical Series besides the determining the ability of a metal to displace another metal from its salt solution.Namakan dua kegunaan Siri Elektrokimia selain daripada menentukan keupayaan logam untuk menyesarkan logam lain daripada larutan garamnya.
……………………………………………………………………………….............
………………………………………………………………………………….............[2 marks]
Copper(II) nitrate solution
Metal P plate
