Leerders stel 'n galvaniese sel op en meet die emk daarvan onder standaardtoestande - NSC Physical Sciences - Question 8 - 2017 - Paper 2
Question 8
Leerders stel 'n galvaniese sel op en meet die emk daarvan onder standaardtoestande.
8.1.1 Skryf die naam van komponent Y neer.
8.1.2 Is At die ANODE of die KATODE... show full transcript
Worked Solution & Example Answer:Leerders stel 'n galvaniese sel op en meet die emk daarvan onder standaardtoestande - NSC Physical Sciences - Question 8 - 2017 - Paper 2
Step 1
8.1.1 Skryf die naam van komponent Y neer.
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Answer
Die naam van komponent Y is 'n Voltmeter of Multimeter.
Step 2
8.1.2 Is At die ANODE of die KATODE?
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Answer
At is die ANODE in hierdie sel.
Step 3
8.1.3 Skryf die algehele (netto) selreaksie neer wat in hierdie sel plaasvind wanneer dit in werking is.
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Die netto selreaksie is:
3Ag+(aq)+At(s)→3Ag(s)+At3+(aq)
Step 4
8.1.4 Bereken die aanwendelike emk van hierdie sel.
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Die aanwendelike emk van die sel kan bereken word as:
Ecell=Ereduction−Eoxidation
Hier is die waardes:
Ecell=0,80V−1,66V=2,46V
Step 5
8.2.1 Skryf die NAAM van die gesekonde elektrode vir halfsel Q neer.
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Die naam van die gesekonde elektrode vir halfsel Q is Platinum (Pt).
Step 6
8.2.2 Noem die standaardtoestande waaronder die halfstelle moet funksioneer om 'n geregverde vergelyk te verseker.
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Die standaardtoestande is gemiddeld:
Konsentrasie: 1 mol·dm⁻³
Temperatuur: 25 °C/298 K
Druk: 101.3 kPa/1.01 x 10⁵ Pa/1 atm
Step 7
8.2.3 Skryf die NAAM of FORMULE neer vir die hoogste emk tussen P, PQ of QR.
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