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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Here's the solution to your questions: a) On the diagram, identify the Cathode and Anode. In an electrolytic cell, the electrodes are connected to a power source. The cathode is the negative electrode, connected to the negative terminal of the power supply. Reduction occurs here. The anode is the positive electrode, connected to the positive terminal of the power supply. Oxidation occurs here. Based on the diagram: The electrode on the left is connected to the negative terminal (shorter line) of the power source, so it is the cathode. The electrode on the right is connected to the positive terminal (longer line) of the power source, so it is the anode. b) If a current of 0.5 A was passed through the solution for 20 minutes, determine the volume of Oxygen liberated at STP. (Molar gas volume = 24 dm^3). The electrolysis of dilute copper(II) sulfate involves the following reaction at the anode (positive electrode), where water is oxidized to produce oxygen gas: 2H_2O(l) O_2(g) + 4H^+(aq) + 4e^- From the reaction, 4 moles of electrons are required to produce 1 mole of oxygen gas. We will use Faraday's constant F = 96500 C/mol as indicated in your notes. Step 1: Calculate the total charge (Q) passed. The time must be in seconds. t = 20 minutes × 60 s/minute = 1200 s Q = I × t Q = 0.5 A × 1200 s Q = 600 C Step 2: Calculate the number of moles of electrons (n_e). n_e = (Q)/(F) n_e = 600 C96500 C/mol n_e ≈ 0.0062176 mol Step 3: Calculate the number of moles of Oxygen (n_O_2) produced. From the balanced equation, 4 moles of electrons produce 1 mole of O_2. n_O_2 = (n_e)/(4) n_O_2 = 0.0062176 mol4 n_O_2 ≈ 0.0015544 mol Step 4: Calculate the volume of Oxygen liberated. Given Molar gas volume = 24 dm^3/mol. Volume of O_2 = n_O_2 × Molar gas volume Volume of O_2 = 0.0015544 mol × 24 dm^3/mol Volume of O_2 ≈ 0.0373056 dm^3 Rounding to three significant figures: Volume of O_2 ≈ 0.0373 dm^3 Last free one today — make it count tomorrow, or type /upgrade for unlimited.