Worksheet 6.2 the Factor of Specific Electrodes

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    Worksheet No. 6.2

    Form 4 Topic 6 6.2 Type of electrode

    Name : Paper 3 (Written Practical Test)

    1.

    Referring to t e statement a!o"e# plan one la!oratory e$periment toin"estigate t e effect of specific electrodes on t e electrolytic process of an

    electrolysis. %o&r e$periment s o&ld incl&de t e follo'ing:Merujuk kepada pernyataan di atas, rancangkan satu eksperimen untukmenyiasat kesan penggunaan elektrod yang tertentu dalam proses elektrolisismerangkumi perkara-perkara berikut :

    (a) im of t e e$periment Tujuan eksperimen 2 *(!) ll t e "aria!les Semua pembolehubah 3 *(c) +tatement of t e ypot esis Pernyataan hipotesis 3 *(d) ,ist of material and apparat&s Senarai bahan dan radas 3 *(e) Proced&re Prosedur 3 *(f) Ta!&lation of data Penjadualan data 3 *

    Write yo&r ans'ers in t e spaces pro"ided.*(a) Pro!lem statement -

    Pernyataan masalah :

    (!)

    ( ll t e "aria!les)anip&lated /aria!le -

    Pembolehubah dimanipulasi :Responding /aria!le -Pembolehubah bergerak balas:0ontrol /aria!le -Pembolehubah dimalarkan :

    (c) +tatement of t e ypot esis -

    Pernyataan hipotesis :

    (d) aterial - Bahan :

    pparat&s - Radas :(e) Proced&re - Prosedur :

    T e &se of car!on electrodes in t e electrolysis of an electrolyte ofcopper( ) s&lp ate# 0&+ sol&tion may yield different prod&cts ' en t eyare replaced 'it copper electrods.

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    (f) Ta!&lation of data -Penjadualan data:

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    +&ggested ans'er

    (a) Pro!lem statement :Pernyataan masalah:

    4oes t e type of electrodes affect t e type of prod&cts formed d&ringt e electrolysis 5

    Adakah jenis elektrod mempengaruhi hasil elekrolisis

    (!)

    ( ll t e "aria!les)anip&lated /aria!le :

    Pembolehubahdimanipulasi :

    Types of electrodes!enis elektrod

    Responding /aria!le:Pembolehubahbergerak balas :

    Types of prod&cts at t e anode"asil di anod

    0ontrol /aria!le :Pembolehubahdimalarkan :

    Type and concentration of electrolyte!enis dan kepekatan elektrolit

    (c)(c)

    +tatement of t eypot esis :Pernyataan hipotesis :

    W en copper electrodes are &sed instead of car!on electrods# t e typesof prod&cts formed at t e anode and t e cat ode are different. Apabila elektrod kuprum digunakan selain elektrod karbon, hasil yangterbentuk di anod dan di katod adalah berbe#a$

    (d) aterial :Bahan :

    pparat&s :Radas :

    .1 mol dm 73 copper( ) s&lp ate# 0&+ sol&tion%$& mol dm-' larutan kuprum())* sul+at$

    8atteries# car!on electrodes# copper electrodes# connecting 'ires 'itcrocodile clips# ammeter# electrolytic cell# electronic !alance# sandpaper'ooden splinter# lig ter.Bateri, elektrod karbon, elektrod kuprum, ayar penyambung dengan

    klip buaya, ammeter, sel elektrolisis, neraca elektronik, kertas pasirkayu uji, pemetik api (e) Proced&re :

    Prosedur :

    1. 0lean t e car!on electrodes 'it sandpaper Weig t e anode and cat ode indi"id&ally# and record yo&rreadings.

    2. Po&r t e copper( ) s&lp ate 0&+ sol&tion into t e electrolyticell 'it car!on electrodes

    3. 0onnect t e !atteries and ammeter 'it electrolytic cell &singconnecting 'ire.

    . T&rn on t e s'itc for 19 min&tes9. Ta e o&t t e anode# 'as it# dry it and t en 'eig it &sing an

    electronic !alance6. Repeat steps 1 to ; &sing copper electrodes to replace car!onelectrodes

    ;. Record all reading and o!ser"ations.

    &$ osok elektrod karbon dengan kertas pasir .$ Timbang anod dan katod secara berasingan dan rekodkan

    bacaan'$ Tuangkan larutan kuprum())*sul+at, /uS0 1 ke dalam sel

    Worksheet No. 6.2

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    elektrolisis yang menggunakan elektrod karbon1$ Sambungkan bateri dan ammeter dengan sel elektrolisis

    menggunakan ayar penyambung 2$ "idupkan suis selama &2 minit 3$ 4eluarkan anod, cuci dan keringkan$Timbangkan menggunakan

    neraca elektrik$5$ 6lang langkah & hingga 5 menggunakan elektrod kuprum untuk

    menggantikan elektrod karbon7$ Rekodkan semua bacaan dan pemerhatian

    (f) Ta!&lation of data :Penjadualan data: