AP Chemistry Laboratory Review 1 Part I – MATCH the following procedures with the correct descriptions or pictures in Part II (not all are shown – you should review these procedures from your laboratory notebook) - Gravimetric Analysis - Determining Reaction Rate and Order - Qualitative Analysis of Cations/Anions - Determining Equilibrium Constant Keq - Determining Molar Mass of Volatile Liquid - Determining Ka of Weak Acid - Determining Molar Mass of Gas - Determining E Cell Potential - Determining Freezing-Point Depression - Determining Heat of Formation / Calorimetry - Determining Melting-Point - Determining ConcentrationVolumetricAnalysis - Determining Water of Hydration and Percentage Composition Part II – ANSWER the following questions about each laboratory technique. WHICH LAB? ________________________________ WHAT ARE YOU TRYING TO FIND? ________________________________________ 1. a) Briefly describe the equipment and procedure used to determine the unknown above. Be sure to include the terms – solute, solvent, solution, freezing-point, colligative properties. b) Draw and label the graph for the pure liquid and solution showing the freezing-point depression. c).The following data were obtained in an experiment designed to find the molar mass of a solute by freezing point depression. Solvent: para-dichlorobenzene Freezing point depression constant: 7.1 °C/m Freezing point of pure solvent: 53.02 °C Mass of para-dichlorobenzene: 24.80 g Mass of unknown substance: 2.04 g Freezing point of solution: 50.78 °C i. Determine the freezing point depression, ΔTfp. ii. Calculate the molar mass of the unknown substance.
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AP Chemistry Laboratory Review
1
Part I – MATCH the following procedures with the correct descriptions or pictures in Part II (not all are
shown – you should review these procedures from your laboratory notebook)
- Gravimetric Analysis - Determining Reaction Rate and Order
- Qualitative Analysis of Cations/Anions - Determining Equilibrium Constant Keq
- Determining Molar Mass of Volatile Liquid - Determining Ka of Weak Acid
- Determining Molar Mass of Gas - Determining E Cell Potential