Question

Name: Pavi kaur Partner: Alyssa Instructor initials, Week 1 Instructor initials, Week 2: CHEM 121 Lab Clark College Experiment 7: Reaction of Magnesium Metal with Hydrochloric Acid Adapted from Bassow by Mermil Parry & Content Goals: Write and balance chemical equations. Determine which gas law(s) are necessary in problem-solving situations Use gas laws and experimental data to solve experimental problems. Process Goals Read and follow complex instructions. Construct and organize a data table. Accurately measure volumes Solve problems that combine stoichiometry, gas laws, and experimental data. Identify and explain experimental error . . . Required Reading: Week 1: Chapter 5, sections 5.1&5.2 Week 2: Chapter 5, sections 5.3-5.5: Chapter 7, sections 7.1-7.6 Pre-Lab Questions -Do this with your lab partner before starting the lab! 1. Write the balanced chemical equation for the reaction: Magnesium metal reacts with aqueous hydrochloric acid (HCI) to produce hydrogen gas (Ha) and aqueous magnesium chloride (MgCa)." 2. Read through this experiment carefully. Underline every sentence that instructs you to make a measurement Part A. Data Collection 1. Obtain a piece of magnesium ribbon approximately 3 cm long. Measure the length of the ribbon carefully to the nearest 0.01cm. Your instructor will give you the mass of 1 m of ribbon. Since it is uniform in thickness, you can calculate the mass of the magnesium used 2. Fold the magnesium ribbon so that it can be encased in a small spiral cage made of fine copper wire (Figure 1). Let enough copper wire serve as a handle so that the cage can rest at the 50mL mark of the gas measuring tube. Mg/HC

Answer 1