Chem 104 experiment - Study guides, Class notes & Summaries

Experiment #: 7 Title: Organic Synthesis Purpose: The purpose of this lab was to determine the process of synthesizing various carboncontaining organic products including aspirin, urea, & salicylic acid. In doing so, we were also able to calculate the percent yield in each of these experiments. Procedure: Part 1: Synthesis of aspirin 1. Placed 2.0 g of salicylic acid & placed it in a flask 2. 5.0 mL of acetic anhydride was then added to the flask & mixed 3. 5 drops of sulfuric acid was a...

Experiment #: 2 Title: Equilibrium Reactions Purpose: The purpose of this experiment is to evaluate and study the equilibrium by measuring the equilibrium constant. Procedure: We performed 2 different experiments: o Determination of the equilibrium constant Kc o Study of LeChatelier’s principle Experiment #1: acetic acid vs. propyl alcohol 1. Summary: After gathering supplies, we created a solution of acetic acid and propyl alcohol in a small flask. At various time intervals, we then...

Experiment #: 6 Title: Electrochemistry Purpose: The purpose of this lab was to study how redox reactions occur & to determine how conductivity can occur between metals & how we can predict if it will react or not. Procedure: Consider: Cu2+ + 2e- -> Cu(s) = reduction Fe(s) -> Fe2+ + 2e- = oxidation Part 1: 1. Utilizing a lightbulb device, we tested the conductive of the following items: a. Metal cylinder  good conductor (bright light) b. Water  poor conductor (no light) c...

CHEM 104 Experiment 5: Buffers - Portage Learning Purpose: The purpose of this lab is to determine how buffers affect the pH of a solution in order to observe how a buffer is resistant to pH changes. Additionally, we determined how enzymes activity is affected by pH. Procedure: Part 1: Determine pH of sodium acetate in water & buffer 1. 2 pH electrodes are place in 2 separate beakers, one filled with tap water & one is filled with a pH 7 buffer (both have an approximate pH of 7) 2. A scoop of s...

Experiment #: 8 Title: Urinalysis Purpose: The purpose of this lab is to carry out several experiments to evaluate the chemical makeup of a simulated urine sample. Procedure: Part 1: Chloride (Cl- ) 1. Prepare a mixture of AgNO3(silver nitrate) & Cl- solutions 2. These are both colorless solutions 3. Combine the solutions & note how they turn cloudy & form a white precipitate Part 2: Phosphate (PO3 -3) 1. Prepare a mixture of PO4 & (NH4)2MoO3 (Ammonium dimolybdate) solutions 2. Add ...

CHEM 104 Experiment 7 Organic Synthesis - Portage Learning Purpose: The purpose of this lab was to determine the process of synthesizing various carboncontaining organic products including aspirin, urea, & salicylic acid. In doing so, we were also able to calculate the percent yield in each of these experiments. Procedure: Part 1: Synthesis of aspirin 1. Placed 2.0 g of salicylic acid & placed it in a flask 2. 5.0 mL of acetic anhydride was then added to the flask & mixed 3. 5 drops of sulfuric...

CHEM 104 Experiment 4: Molarity of vitamin C

CHEM 104 Experiment 3 Titrations and Titration Curves - Portage Learning Purpose: The purpose of this to perform titration analyses, including neutralization titrations, which occur between an acid and a base. Procedure: After gathering the necessary supplies, it was decided that we would perform reactions between the following solutions: strong acid/strong base, weak acid/strong base and strong acid/weak base. Standardization titration of NaOH: Used a strong acid/weak base. We determine the mo...

CHEM 104 Experiment 6: Electrochemistry - Portage Learning Purpose: The purpose of this lab was to study how redox reactions occur & to determine how conductivity can occur between metals & how we can predict if it will react or not. Procedure: Consider: Cu2+ + 2e- -> Cu(s) = reduction Fe(s) -> Fe2+ + 2e- = oxidation Part 1: 1. Utilizing a lightbulb device, we tested the conductive of the following items: a. Metal cylinder  good conductor (bright light) b. Water  poor conductor (no ...

CHEM 104 Experiment 8: Urinalysis - Portage Learning Purpose: The purpose of this lab is to carry out several experiments to evaluate the chemical makeup of a simulated urine sample. Procedure: Part 1: Chloride (Cl- ) 1. Prepare a mixture of AgNO3(silver nitrate) & Cl- solutions 2. These are both colorless solutions 3. Combine the solutions & note how they turn cloudy & form a white precipitate Part 2: Phosphate (PO3 -3) 1. Prepare a mixture of PO4 & (NH4)2MoO3 (Ammonium dimolybdate) solutions ...