Level 1 – Equipment  What piece of equipment is NOT useful for performing a recrystallization?

Level 2 – KTOF-3 – Term and Example Recognition  Which of the following was acting as a bidentate ligand in the KTOF-3 Synthesis and Recrystallization lab?

Hess’s Law – Level 2 You are performing a reaction in a coffee cup calorimeter. You add a 1.00 g piece of magnesium metal (Mg) to 100.0 mL of 1.00 M hydrochloric acid (HCl). The reaction that occurs is:Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)During the reaction, the temperature of the solution increases from 25.0°C to 32.5°C. Assume the specific heat capacity of the solution is the same as water, 4.18 J/g°C, and the density of the solution is 1.00 g/mL.Calculate the enthalpy change of the reaction (ΔH) using Hess’s Law.

Hess’s Law – System vs. Surroundings  – Level 1 When a student dissolves a salt in water inside a coffee-cup calorimeter, the temperature of the solution drops noticeably because a dissolution reaction occurs. Which statement best describes what is happening in terms of the system and surroundings?

Level 2 – Data Analysis and Table Reading for Freezing point/Boiling point analysis A student performs a Freezing Point experiment with the intentions of molality of a solution consisting of water dissolved in chloroform. They began by gathering the following table and then executed the experiment as stated below. Table 1. Chemical Properties Table Solvent Normal Boiling Point (oC) Kb (oC/m) Normal Freezing Point (oC) Kf (oC/m) Water (H2O) 100 0.22 0.0 1.86 Benzene (C6H6) 80.1 2.53 5.5 5.12 Ethanol (CH3CH2OH) 78.4 1.22 -114. 1.99 Carbon Tetrachloride (CCl4) 76.8 5.02 -22.3 29.8 Chlorform (CH3Cl) 61.2 3.63 -63.5 4.68 Note: None of the compounds above dissociate into smaller ions.Table is courtesy of http://wps/prenhall.com The experiment was setup as follows: Volume is 0.25 L solvent, the solution and pure solvent density are the same (1g/mL), the solute and solvent are perfectly solubility.At the end of the experiment, the student observed the freezing point of the solution occurred 3.72oC lower than the expected pure solvent freezing point. What would be the molality the solution?

Terminology – Spectroscopy – Level 1 Examine the following figure and determine the correct terminology that describes the spectroscopic shift for “I” (the one on the left).

Dye Absorbance and Transition Energy – Level 2 Four different dyes each absorb light at a different maximum wavelength (λmax):   Dye λₘₐₓ (nm) A 350 nm B 425 nm C 510 nm D 615 nm Which of these dyes absorbs photons with the the highest energy?

VESPR – Level 2 Given the following molecule, select the answer that has the correct hybridization.

In Module pages 6.3-6.9, which of the following laws is identified in the sources as having led to a major demographic shift and a significant increase in the Asian American population after a long period of restrictive immigration policies?

According to Haunani-Kay Trask in 6.10, what is the political status of Hawaii in relation to the United States?