Electrolysis Of Molten Zinc Bromide

1. Electrode A is known as the anode.

True

False

Electrode A is negatively charged (as it is connected to the negative end of the battery). It is the cathode.

Explanation

Electrode A is negatively charged (as it is connected to the negative end of the battery). It is the cathode.

2. A reduction reaction has taken place at electrode _______________.

A

B

A reduction reaction has taken place at electrode A.

Explanation

A reduction reaction has taken place at electrode A.

3. The chloride ions are _______________ in the electrolysis reaction.

Reduced

Oxidized

In the electrolysis reaction, chloride ions are oxidized. This means that they lose electrons and undergo a chemical reaction in which their oxidation state increases. Oxidation occurs at the anode, where chloride ions give up their electrons to form chlorine gas. This process is essential for the overall reaction to occur, as it allows for the reduction of other species at the cathode.

Explanation

In the electrolysis reaction, chloride ions are oxidized. This means that they lose electrons and undergo a chemical reaction in which their oxidation state increases. Oxidation occurs at the anode, where chloride ions give up their electrons to form chlorine gas. This process is essential for the overall reaction to occur, as it allows for the reduction of other species at the cathode.

4.

Bromide ions would move towards electrode A

True

False

Look at the cell properly. The longer line represents positive end of the battery.

Explanation

Look at the cell properly. The longer line represents positive end of the battery.

5. The anode half equation is _______________.(a) 2Br^-(l) --> Br₂(g) + e(b) 2Br^-(l) --> Br₂(l) + 2e(c) Zn²⁺(l) + 2e--> Zn(s)(d) Zn²⁺(l) + 2e --> Zn(l)

(a)

(b)

(c)

(d)

The correct answer is (a) because it represents the oxidation of bromide ions (Br-) to bromine gas (Br2) and the release of an electron (e). This is consistent with the definition of an anode, which is the electrode where oxidation occurs.

Explanation

The correct answer is (a) because it represents the oxidation of bromide ions (Br-) to bromine gas (Br2) and the release of an electron (e). This is consistent with the definition of an anode, which is the electrode where oxidation occurs.

6. The cathode half equation is _______________.(a) Br^-(l) --> Br₂(g) + e(b) 2Br^-(l) --> Br₂(l) + 2e(c) Zn²⁺(l) + 2e--> Zn(s)(d) Zn²⁺(l) + 2e --> Zn(l)

(a)

(b)

(c)

(d)

The correct answer is (d) because it represents the reduction half-reaction of zinc ions (Zn2+) being reduced to zinc (Zn) by gaining two electrons (2e-). This is consistent with the definition of a cathode, which is the electrode where reduction occurs in an electrochemical cell.

Explanation

The correct answer is (d) because it represents the reduction half-reaction of zinc ions (Zn2+) being reduced to zinc (Zn) by gaining two electrons (2e-). This is consistent with the definition of a cathode, which is the electrode where reduction occurs in an electrochemical cell.