Free Printable Electrochemistry-1

Worksheets

Electrochemistry-1

Total questions: 20

Worksheet time: 30mins

Name

Class

Date

Electrons always flow from

cathode to anode

anode to cathode

Given their standard reduction potentials, which of the species is going to be oxidized?

Cu²⁺/Cu = 0.34V

Zn²⁺/Zn = -0.76V

CuSO4

ZnSO4

An iron nail is put into a solution of copper nitrate, iron is above copper in the activity series of metals, what will happen?

iron will be reduced

bubbles of oxygen gas will form on iron nail

the iron nail will become copper plated

no reaction occurs

What occurs to the mass of copper electrode in the following reaction?

Zn/Zn²⁺ // Cu²⁺/Cu

increases

decreases

remains the same

Which metal is the negative electrode?

Zn/Zn²⁺ // Cu²⁺/Cu

zinc

copper

What reaction occurs at the anode?

Ag⁺/Ag = 0.80V

Ni²⁺/Ni = -0.25V

Ag⁺ + e^- →Ag

Ag → Ag⁺ + e^-

Ni²⁺ + 2e^- → Ni

Ni → Ni²⁺ + 2e^-

What would be the theoretical cell potential of the previous electrochemical cell?

Ag⁺/Ag = 0.80V

Ni²⁺/Ni = -0.25V

1.05V

-1.05V

0.55V

-0.55V

Given their standard reduction potentials, which of the species is going to be oxidized?

Cu²⁺/Cu = 0.34V

Zn²⁺/Zn = -0.76V

CuSO4

ZnSO4

An oxidizing agent will

increase in mass

lose electrons

be reduced

increase in oxidation number

10.

In the following reaction

Sn⁺² + 2Fe⁺³ --> Sn⁺⁴ + 2Fe⁺²,

the reducing agent is...

Fe⁺³

Sn⁺²

Sn⁺⁴

Fe⁺²

11.

Galvanic cells convert

mechanical energy in to electrical energy

potential energy in to electrical energy

electrical energy in to chemical energy

chemical energy in to electrical energy

12.

What is oxidation number of Cr in Cr₂O₇^2-?

-2

+12

13.

Which direction do the electrons flow in wire X and which metal is oxidized?

14.

Calculate standard cell potential for this equation:

Zn²⁺(aq) + 2e → Zn(s) Eº = – 0.76 V

Cd²⁺(aq) + 2e → Cd(s) Eº = – 0.40 V

E^ocell = -0.36 V

E^ocell = -1.16 V

E^ocell = +1.16 V

E^ocell = +0.36 V

15.

What is the oxidation number of nitrogen in N₂?

-3

-1

16.

Which element is oxidised in the reaction Zn + 2HCl $\rightarrow$ ZnCl2 + H2 $\$

Zinc

Hydrogen

Chlorine

None

17.

What are the coefficients when the equation is balanced?

2 + 3 --> 2 + 3 + 4

1 + 3 --> 1 + 3 + 2

2 + 4 --> 2 + 3 + 2

1 + 1 --> 1 + 1 + 1

18.

What are the coefficients when the equation is balanced?

1 + 1 + 1 --> 2 + 1 + 3

2 + 2 + 2 --> 4 + 2 + 3

1 + 2 + 1 --> 2 + 2 + 3

1 + 1 + 1 --> 1 + 1 + 1

19.

What element is being Oxidized?

20.

What is oxidation number of H in CaH₂?

-1

100 %

Electrochemistry-1

Total questions: 20

Worksheet time: 30mins

Similar Resources on Wayground