Experimental Lab Protocol: Iron Reactivity with Sodium Chloride and Copper(II) Chloride

Primary Objective: The purpose of this laboratory exercise is to observe and compare the chemical behavior of an iron nail when introduced to two different chemical solutions.
Specific Reaction Pairs: * Reaction A: Iron nail ( $Fe$ ) reacted with Sodium chloride ( $NaCl$ ). * Reaction B: Iron nail ( $Fe$ ) reacted with Copper(II) chloride (CuCl_2_{(aq)}).
Experimental Goal: The experiment is designed to determine which of these specific chemical combinations results in a reaction and which remains non-reactive.

Independent Variable: The identity of the chemical solution used in the trial (Sodium chloride versus Copper(II) chloride).
Dependent Variable: The outcome of the experiment, specifically defined as whether or not a chemical reaction occurs.

Group Restrictions: Students are required to split into small working groups. Each group must consist of no more than four ( $4$ ) individuals.
Movement Protocol: Students are instructed to remain at their current location until the instructor has finished speaking, at which point they may proceed to their assigned lab tables.
Material Handling Policy: Upon reaching the lab tables, students are strictly forbidden from touching any lab materials until they have completed the initial preparatory steps.

Step 1: Information Review: Students must carefully read the "driving question" and the "background" information provided on the class sets located at the lab tables.
Step 2: Documentation Setup: Based on the provided background information, students must create a Title and a Statement of Purpose for the lab on their worksheets.
Step 3: Background Analysis: Students are required to answer the background questions included in the lab documentation.
Step 4: Hypothesis Formulation: Before beginning the physical experiment, students must construct a formal hypothesis predicting the outcomes of the chemical tests.

Permitted Items: The only item allowed at the laboratory table is the student's lab worksheet.
Prohibited Items: To maintain a clean and safe workspace, the following must be left away from the lab benches: * Personal bags. * Personal beverages or drinks. * KDT (personal items/devices).

Question: "Any questions?"
Context: The instructor concluded the briefing by providing an opportunity for student inquiries regarding the procedure, group formation, or safety protocols.