CHE 220 - General Chemistry II (Lab) - Textbook: Welcome!

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CHE 220 - General Chemistry II Lab

Compiled by Nelson Nuñez Rodriguez

Lab 1: Excel Assignment

Lab 2: Qualitative Analysis of Group III Cations

• Perform control tests with various Group III cations 

• Determine the identity of Group III cations in a solution

• Perform control tests with various anions 

• Determine the identity of various anions in a solution

Lab 3: Reaction Kinetics: Initial Rates via the Iodine Clock Reaction

• Determine the rate law of a reaction using the Method of Initial Rates (Week 3)

• Determine the activation energy of the reaction (Week 4)

• Examine the effect of a catalyst on the reaction rate  (Week 4)

Lab 4: Le Châtelier’s Principle

• Observe the effect of changing reactant/product concentration and temperature on chemical systems at equilibrium 

• Use Le Châtelier’s Principle to explain the shifts

• Study the effects of a strong acid on the solubility of different precipitates 

• Study the common-ion effect

Lab 5: pH Measurement and its Applications

• Measure the pH of various solutions using pH indicators and meter (pHmeter only) (Part A, B)

• determine the value of Ka for an unknown acid by measuring pH (Part C) or by

• performing a pH titration (Part D)

• create and study the properties of buffer solutions (Part E)

Lab 6: Weak Acids, Weak Bases and Salts

• Measure the pH of weak acid, weak base, and salt solutions

• Calculate he Ka and Kb values 

• Rank the weak acids and the weak bases according to relative strength

Lab 7: Properties of Systems in Equilibrium –  Le Châtelier’s Principle

• Observe the effects of changing the solution volume and temperature on the solubility equilibrium 

• Find a reagent that will shift the acid-base equilibrium (optional - professor's discretion)

• Test the effects of changing the volume and temperature on the complex ion equilibrium

Lab 8: Determination of Kc for a Complex Ion Formation

• Find the value of Kc for formation of a complex ion by using a spectrophotometer

• Confirm the stoichiometry of the reaction (optional - professor's discretion)

Lab 9: Electrochemistry Lab

• Construct 6 galvanic cells

• Compare calculated and measured Ecells

• Concentration and electrolytic cells (optional - professor's discretion)

Lab 10: Introduction to the Structures and Isomerism of Simple Organic Molecules - Description and Modeling

• Construct molecules using model kits

• Draw projection and perspective pictures

• Find the geometry of the central atom(s)

• Determine hybridization, angle(s)

• Draw the structures of all isomers (if applies)

Lab 11: Synthetic Polymers and Plastics

• Understand properties and uses of synthetic thermoplastics

• Compare the physical properties of “Big Six” plastics 

• Identify everyday plastics by their physical properties 

• Draw basic structures of polymers when given monomer structure