3.OG - (ispravak - 1.ppz) - Elektrokemija

3.OG - (ispravak - 1.ppz) - Elektrokemija

11th Grade

14 Qs

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3.OG - (ispravak - 1.ppz) - Elektrokemija

3.OG - (ispravak - 1.ppz) - Elektrokemija

Assessment

Quiz

Chemistry

11th Grade

Practice Problem

Medium

Created by

Danijela Leko

Used 2+ times

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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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