Die elektrochemiese sel wat in die diagram hieronder voorgestel word, is vir die ontbinding van gesmelte koper(II)chloried gebruik - NSC Technical Sciences - Question 5 - 2019 - Paper 2
Question 5
Die elektrochemiese sel wat in die diagram hieronder voorgestel word, is vir die ontbinding van gesmelte koper(II)chloried gebruik.
5.1 Watter tipe elektrochemiese ... show full transcript
Worked Solution & Example Answer:Die elektrochemiese sel wat in die diagram hieronder voorgestel word, is vir die ontbinding van gesmelte koper(II)chloried gebruik - NSC Technical Sciences - Question 5 - 2019 - Paper 2
Step 1
Watter tipe elektrochemiese sel word in die diagram hierbo voorgestel?
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Answer
Die tipe elektrochemiese sel wat in die diagram voorgestel word, is 'n elektrolietiese sel. Hierdie sel gebruik 'n eksterne kragbron om chemiese reaksies aan te stimuueer.
Step 2
Skryf die energieomsetting neer wat in hierdie sel plaasvind.
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In die elektrolietiese sel vind 'n omskakeling van elektriese energie na chemiese energie plaas. Dit kan voorgestel word as:
Elektrieseenergie→Chemieseenergie
Step 3
Wat er elektrode is die:
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Step 4
Anode
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Die anode is elektrode A, wat aan die positiewe kant van die battery verbind is.
Step 5
Katode
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Die katode is elektrode B, wat aan die negatiewe kant van die battery verbind is.
Step 6
Skryf die halfreaksie neer wat by die volgende elektrode plaasvind:
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Step 7
A
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Answer
Die halfreaksie by elektrode A (anode) is:
2Cl−→Cl2+2e−
Step 8
B
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Die halfreaksie by elektrode B (katode) is:
Cu2++2e−→Cu
Step 9
Is die reaksie wat in hierdie elektrochemiese sel plaasvind SPONTAAAN of NIE-SPONTAAAN?
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Die reaksie is nie-spontaan, omdat 'n eksterne elektrisiteitsbron benodig word om die reaksie aan te dryf.
Step 10
Verduidelik die antwoord op VRAAG 5.5.
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Die proses is nie-spontaan omdat daar buite ingryping van elektrisiteit nodig is om die chemiese verandering tot stand te bring. Dit beteken dat sonder die toevoer van elektriese energie, die reaksie nie natuurlik sal voortgaan nie.
