This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Welcome back Mc — missed you this week. a) Step 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. Step 2: Define cathode and anode. The anode is the positive electrode. The cathode is the negative electrode. Step 3: Assign the electrodes. Therefore, A is the anode and B is the cathode. Anode: A Cathode: B b) Step 1: Identify the ions present in molten lead(II) bromide. Molten lead(II) bromide (PbBr_2) dissociates into Pb^2+ ions and Br^- ions. Step 2: Write the half-equation for the cathode (reduction). At the cathode (negative electrode), lead(II) ions gain electrons to form lead metal. Pb^2+(l) + 2e^- Pb(l) Step 3: Write the half-equation for the anode (oxidation). At the anode (positive electrode), bromide ions lose electrons to form bromine gas. 2Br^-(l) Br_2(g) + 2e^- Cathode equation: Pb^2+(l) + 2e^- Pb(l) Anode equation: 2Br^-(l) Br_2(g) + 2e^- 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. d) The process of using electric current to decompose an ionic compound is called electrolysis. Name of process: Electrolysis 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. f) Yes, lead(II) bromide conducts electricity in the molten state. This is because when molten, its ions (Pb^2+ and Br^-) are free to move and carry charge, allowing for electrical conduction. Conductivity: Yes 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 Send me the next one 📸