Page 7 - Modul A+1 Kimia Tingkatan 5

I Kesan Nilai E Terhadap Pemilihan Ion untuk Dinyahcas
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The Effects of E Value on the Selective Discharge of Ions
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A KTIVITI 1.7
Bab 1 Tujuan/ Aim:

Mengkaji elektrolisis larutan akueus kuprum(ll) sulfat, CuSO dan asid sulfurik, H SO cair dengan menggunakan
4 2 4
elektrod karbon.
To investigate the electrolysis of the aqueous solution of copper(ll) sulphate, CuSO and dilute sulphuric acid, H SO with
2
4
4
carbon electrodes. –3 –3
Bahan/ Materials:
Eksperimen Wajib Larutan asid sulfurik cair, H SO 0.1 mol dm , larutan kuprum(II) sulfat, CuSO 0.1 mol dm , kayu uji
4
4
2
0.1 mol dm dilute sulphuric acid, H SO , 0.1 mol dm copper(II) sulphate, CuSO solution, wooden splinter
–3
–3
4
2
4
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Radas/ Apparatus:
Sel elektrolisis, tabung uji, bateri, ammeter, elektrod karbon, wayar penyambung dengan klip buaya, suis
Electrolytic cell, test tubes, batteries, ammeter, carbon electrodes, connecting wires with crocodile clip, switch
Prosedur/ Procedure:
Tabung uji
Test tube
Elektrod karbon
Carbon electrodes
Larutan kuprum(II) sulfat, CuSO 4
solution
Copper(II) sulphate, CuSO 4
Suis Ammeter
A
Switch Ammeter
Bateri
Battery
Rajah/Diagram 1.15
–3
1. Larutan kuprum(ll) sulfat, CuSO 0.1 mol dm dituang ke dalam sel elektrolisis sehingga setengah penuh.
4
0.1 mol dm copper(ll) sulphate, CuSO solution is poured into an electrolytic cell until half full.
–3
4
–3
2. Dua tabung uji diisi dengan larutan kuprum(ll) sulfat, CuSO 0.1 mol dm dan ditelangkupkan ke atas
4
elektrod karbon.
–3
Two test tubes are filled with 0.1 mol dm copper(ll) sulphate, CuSO solution and inverted onto the carbon
4
electrodes.
3. Elektrod karbon disambung kepada bateri, suis dan ammeter dengan menggunakan wayar penyambung
seperti ditunjukkan pada Rajah 1.15.
Carbon electrodes are connected to the batteries, switch and ammeter as shown in Diagram 1.15 using the connecting
wires.
4. Suis dihidupkan selama 15 minit.
The switch is turned on for 15 minutes.
5. Pemerhatian pada anod dan katod direkodkan.
Observations at the anode and cathode are recorded.
6. Gas yang terkumpul pada anod diuji dengan kayu uji berbara manakala gas yang terkumpul pada katod
diuji dengan kayu uji bernyala.
Gas collected at the anode is tested with a glowing wooden splinter while gas collected at the cathode is tested with
a burning wooden splinter.
–3
7. Langkah 1 hingga 6 diulang dengan menggunakan asid sulfurik cair, H SO 0.1 mol dm .
2
4
Steps 1 to 6 are repeated by using 0.1 mol dm dilute sulphuric acid, H SO .
–3
2 4
Pemerhatian/ Observation: TP 3
Elektrolit Larutan kuprum(II) sulfat, CuSO Asid sulfurik cair, H SO
4 2 4
Electrolyte Copper(II) sulphate, CuSO solution Dilute sulphuric acid, H SO
4 2 4
Anod (+) Gelembung gas dibebaskan. Gas tidak Gelembung gas dibebaskan. Gas tidak
Anode (+) berwarna menyebabkan kayu uji berbara berwarna menyebabkan kayu uji berbara
menyala. menyala.
Gas bubbles are released. A colourless gas Gas bubbles are released. Colourless gas
ignites the glowing wooden splinter. ignites the glowing wooden splinter.

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