3.OG - (ispravak - 1.ppz) - Elektrokemija
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Medium
Danijela Leko
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14 questions
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1.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Zn -----> Zn2+ + 2e-
Ovo je reakcija koja se zove ___________.
(1 bod)
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Odaberi točne tvrdnje o galvanskim člancima. (više točnih odgovora)
(0.5 bodova za svaki točan odgovor)
sastoje se od dvije elektrode
služe za proizvodnju kemijske energije iz električne struje
elektroni teku s katode prema anodi
elektrone otpušta reaktivniji metal
elektrolitski most služi za zatvaranje strujnog kruga
3.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Što je standardni redukcijski potencijal tvari manji, tvar će se lakše _______________. (1 bod)
4.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Jednadžba oksidacije natrijevog atoma je _________________. (2 boda)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Redoks reakciju 3 Cl2(g) + 2 Fe(s) ➝ 6 Cl-(aq) + 2 Fe3+(aq) shematski prikazujemo:
Cl2(g) / Cl-(aq) // Fe(s)/Fe3+(aq)
Fe(s)/Fe3+(aq) // Cl2(g) / Cl-(aq)
Fe3+(aq)/Fe(s) // Cl-(aq) / Cl2(g)
Cl-(aq) / Cl2(g) // Fe3+(aq)/Fe(s)
6.
OPEN ENDED QUESTION
30 sec • 1 pt
Što je galvanizacija i čemu služi (navedi primjer)?
(2 boda)
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7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ako imamo galvanski članak načinjen od aluminija i kalcija -na anodi će se desiti reakcija: (jedan točan odgovor)
(1 bod)
Ca - 2e- ----> Ca2+
Ca2+ + 2e- -----> Ca
Al - 3e- -----> Al3+
Al3+ + 3e- -----> Al
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