Electrolytic cell lab report

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The lab document is attached.The pictures for the experiment is also attached.

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This is an informal lab report for Experiment 3 Qualitative Analysis of Electrolysis Reactions.Please write neatly and legibly.

Part A: Preliminary observations

Table 1: Tests for Cu2+ and SO3-2

What I Did

Observations including before & after colors

Positive test for Cu2+: 0.020 M CuSO4 + conc. NH3

Negative test for Cu2+: Distilled water + conc. NH3

Positive test for sulfite, SO3-2:0.1 M Na2SO3 + 0.2 mM KMnO4

Negative test for sulfite, SO3-2:Distilled water + 0.2 mM KMnO4

Part B: Qualitative Analysis of an Electrolytic Cell (Cu and Zn electrodes)

Table 2: Observations and measurements

What I Did

What I observed or measured

Conclusion(s) based on observation(s) or measurement(s)

Observed Cu cathode

Observed solution near Cu cathode

Sulfite (SO32-) test

Massed Zn anode before experiment (g)

Massed Zn anode after experiment (g)

Observed Zn anode

Observed solution near Zn anode

Question 1: Identify which of the reduction half-reactions (1A, 1B, 1C) occurs at the cathode.Your explanation is in the conclusion column of Table 2, so no need to defend answer. ____________

Question 2: Explain why the reduction of Zn (s) was not included as a choice. Think electron configuration.

Question 3: Explain why the reduction of Cu (s) was not included as a choice. Think electron configuration.

Question 4: Identify which of the oxidation half-reactions (2A or 2B) occurs at the anode. Your explanation is in the conclusion column of Table 2, so no need to defend your answer. ____________