Free Printable GALVANIC CELLS AND ELECTROYTIC CELLS

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GALVANIC CELLS AND ELECTROYTIC CELLS

Total questions: 25

Worksheet time: 6hrs 15mins

Name

Class

Date

In a Galvanic Cell, the anode is...

positive

negative

Reduction occurs at the...

anode

cathode

In a Galvanic cell, the electrons flow from the...

anode to the cathode

cathode to the anode

E_cell =

E_red - E_ox

E_red + E_ox

E_ox - E_red

E_ox + E_red

In a redox reaction, the oxidising agent... (choose two options)

is oxidised

is reduced

increases its oxidation number

decreases its oxidation number

In a Galvanic Cell, the salt bridge...

completes the circuit so that electrons can flow through the wire

maintains charge balance

is soaked in an unreactive electrolyte such as KNO₃

all of the above

Consider the galvanic cell reaction Zn (s) + Cu²⁺ (aq) → Cu (s) + Zn²⁺ (aq) When the cell is running spontaneously, which is the only true statement?

The copper electrode loses mass and the zinc electrode is the cathode.

The copper electrode gains mass and the copper electrode is the cathode.

The zinc electrode gains mass and the zinc electrode is the anode.

The zinc electrode loses mass and the zinc electrode is the cathode.

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg

Which is the half-reaction occurring at the anode?

HgO + 2 e- → Hg + O^2-

Zn²⁺ + 2 e- → Zn

Zn → Zn²⁺ + 2 e-

ZnO + 2 e- → Zn

Select all the standard conditions used to measure the standard electrode potentials:

electrolyte solution 1 moldm^-3

298K temperature

all chemicals in gaseous form

1atm pressure

standard hydrogen electrode as comparison

10.

Consider the galvanic cell given.
Which of the following deductions about this cell is correct?

Oxidation is occurring in half-cell 2

The positive electrode is in half-cell 2

Oxidation is occurring in half-cell 1

The negative electrode is in half-cell 1

11.

Reactions in galvanic cells are

spontaneous, redox reactions

non-spontaneous, redox reactions

spontaneous, non-redox reactions

non-spontaneous, non-redox reactions

12.

A VCE chemistry student sets up a galvanic cell using two standard half-cells with half reactions.

Half-cell 1: Cr³⁺(aq)+e^-→Cr²⁺(aq)

Half-cell 2: Cr(s)→Cr²⁺(aq)+2e^-

Using this information, we can determine that;

Half-cell 1 is the anode, where oxidation occurs

Half-cell 1 is the cathode, where reduction occurs

No spontatneous reaction will occur, since only chromium is involved

Cr³⁺is the reductant, since it undergoes reduction

13.

What reaction occurs at the anode?

Ag⁺ + e^- →Ag

Ag → Ag⁺ + e^-

Ni²⁺ + 2e^- → Ni

Ni → Ni²⁺ + 2e^-

14.

Write the cell notation for a galvanic cell with a copper electrode and a zinc electrode.

Cu(s) | Zn2+(aq) || Cu2+(aq) | Zn(s)

Cu(s) | Cu2+(aq) || Zn2+(aq) | Zn(s)

Zn(s) | Cu2+(aq) || Zn2+(aq) | Cu(s)

Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s)

15.

The cathode is ___________.

Sn(s)|Sn(aq)²⁺‖Ag(aq)²⁺|Ag(s).

Sn²⁺

Ag²⁺

16.

Which of the following statements is/are true?

I. The electrons are transferred from Ag to Mg

II. At the end of the reaction, the concentration of Ag+ decreases

III. The mass of Mg would decrease during the course of the reaction

Mg / Mg²⁺ // Ag⁺ / Ag

II and III only

I and II only

II only

III only

17.

What are the features of a standard hydrogen electrode?

I and II

I and III

II and III

I, II and III

18.

Which represents reduction process occurring in standard hydrogen electrode?

H_2(g) → 2H⁺_(aq) + 2e^–

H⁺_(aq) + OH^–_(aq) → H₂O_(l)

2H⁺_(aq) + 2e^– → H_2(g)

O_2(g) + 4H⁺_(aq) + 4e– → 2H₂O_(l)

19.

Which statement is correct about value of E^ο?

more positive value E^ο, greater driving force for reduction

more negative value E^ο, greater driving force for reduction

more positive value E^ο, greater the rate of reaction

more negative value E^ο, greater the rate of reaction

20.

Which statement is correct?

Ca²⁺ can oxidize Ni

Ni²⁺ can reduce Ca²⁺

Fe³⁺ can oxidize Ni

Fe³⁺ can reduce Ca²⁺

21.

What ions are present in molten aluminium oxide?

Al³⁺, O^2-, H⁺, OH^-

Al³⁺, O^2-

Al³⁺, OH^-

22.

What particle carries the charge in the wire?

electron

proton

ion

atom

23.

Which statement correctly describes the 2 electrodes?

The anode is negative and the cathode is positive

The anode and cathode are both positive

The anode is positive and the cathode is negative

The anode and cathode are both negative.

24.

What is the equation to show what happens to Cl ions at the anode.

Cl^- --> Cl + e-

2Cl^- --> Cl₂ + 2e-

Cl₂ + 2e-2Cl^-

Cl₂ + 2e-_-->2Cl^-

25.

If the fork is to be electroplated with silver metal, what electrolyte should be used?

Molten silver chloride

Aqueous silver nitrate

Sodium chloride solution

Copper(II) sulphate solution

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GALVANIC CELLS AND ELECTROYTIC CELLS

Total questions: 25

Worksheet time: 6hrs 15mins

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