We read your photo as:

Describe the electrochemical process occurring in molten lead(II) bromide, including electrode identification, half-equations, and the function of an ammeter.

Chemistry

ScanSolve AI Answer

Answer

b

Pb2+(l)+2e−⟶Pb(l)\text{Pb}^{2+}\text{(l)} + 2\text{e}^- \longrightarrow \text{Pb(l)}

2Br−(l)⟶Br2(g)+2e−2\text{Br}^{-}\text{(l)} \longrightarrow \text{Br}_2\text{(g)} + 2\text{e}^-

Step-by-step solution

6 steps

Part a· 3 steps

  1. Identify the connection of each electrode to the power supply.

    Electrode A is connected to the positive terminal.
    Electrode B is connected to the negative terminal.

  2. Define cathode and anode.

    The anode is the positive electrode.
    The cathode is the negative electrode.

  3. Assign the electrodes.

    Therefore, A is the anode and B is the cathode.
    Anode: A
    Cathode: B

Part b

Pb2+(l)+2e−⟶Pb(l)\text{Pb}^{2+}\text{(l)} + 2\text{e}^- \longrightarrow \text{Pb(l)}

  1. Identify the ions present in molten lead(II) bromide.

    Molten lead(II) bromide (PbBr2\text{PbBr}_2) dissociates into Pb2+\text{Pb}^{2+} ions and Br−\text{Br}^{-} ions.

  2. Write the half-equation for the cathode (reduction).

    At the cathode (negative electrode), lead(II) ions gain electrons to form lead metal.

    Pb2+(l)+2e−⟶Pb(l)\text{Pb}^{2+}\text{(l)} + 2\text{e}^- \longrightarrow \text{Pb(l)}

  3. Write the half-equation for the anode (oxidation).

    At the anode (positive electrode), bromide ions lose electrons to form bromine gas.

    2Br−(l)⟶Br2(g)+2e−2\text{Br}^{-}\text{(l)} \longrightarrow \text{Br}_2\text{(g)} + 2\text{e}^-

    Cathode equation: Pb2+(l)+2e−⟶Pb(l)\boxed{\text{Pb}^{2+}\text{(l)} + 2\text{e}^- \longrightarrow \text{Pb(l)}}
    Anode equation: 2Br−(l)⟶Br2(g)+2e−\boxed{2\text{Br}^{-}\text{(l)} \longrightarrow \text{Br}_2\text{(g)} + 2\text{e}^-}

Part c

The function of the ammeter is to measure the magnitude of the electric current flowing through the circuit.
Function: To measure the electric current.

Part d

The process of using electric current to decompose an ionic compound is called electrolysis.
Name of process: Electrolysis

Part e

An electrolyte is a substance that contains free ions and can conduct electricity when molten or dissolved in a solvent. These ions are responsible for carrying the electric charge.
Definition: An electrolyte is a substance that conducts electricity due to the movement of ions when in a molten state or dissolved in a solution.

Part f

Yes, lead(II) bromide conducts electricity in the molten state. This is because when molten, its ions (Pb2+\text{Pb}^{2+} and Br−\text{Br}^{-}) are free to move and carry charge, allowing for electrical conduction.
Conductivity: Yes

Part g

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit, such as an electrolyte.
A suitable electrode for electrolysis, especially when inertness is required, is graphite.
Definition of electrode: An electrical conductor through which electricity enters or leaves an electrolyte.
Suitable electrode: Graphite

Was this helpful?

Try one yourself

A new problem that tests the same skill.

Still stuck on this one?

Ask a follow-up, and the answer starts from this question.

Got a different question?Ask your own question

More Chemistry Questions

QExplain the electrolysis of molten lead(II) bromide, including the role of heating, electron flow…QExplain the electrolysis of molten lead(II) iodide, including relevant definitions and chemical…QWhich particles conduct electricity in molten lead (II) bromide and lead metal? Explain melting…QComplete the diagram for electrical conduction in lead (II) iodide and explain observations and…QWhich particles conduct electricity in: a) Molten lead (II) bromide b) Lead metal 6. Explain why…
See all Chemistry questions →
Got a syllabus? Photograph it and I'll tell you what's due and what's worth the most.