5 Post- + Pre-Lab Answer Keys

5 Post- + Pre-Lab Answer Keys - ANSWER KEY: EXPERIMENT #5...

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1 ANSWER KEY: EXPERIMENT #5 PRE-LAB QUESTIONS: 1. (1 point) e.g. from MSDS’s: Both acids and bases are potentially hazardous to your eyes. People react quicker to acid in the eyes due to the very noticeable irritation with acids. Sodium hydroxide is probably more hazardous because of the tendency of bases to react with (solubilize) body tissue . Risk of permanent damage is greater with NaOH. 2. (0 points) From MSDS’s: Thioacetamide : Toxic. Can cause cancer - Group II (very hazardous). Harmful if swallowed. Irritating to eyes and respiratory system. After inhalation - Supply fresh air. If required, provide artificial respiration. Keep patient warm. After skin contact - Immediately wash with water and soap and rinse thoroughly. After eye contact- Rinse opened eye for several minutes under running water. For any of these, or swallowing, seek immediate medical advice. Hydrogen sulfide (H 2 S) : Hydrogen Sulfide is a toxic and irritant gas whose effects are exerted on the respiratory tract, gastrointestinal tract, eyes and central nervous system. Odor is NOT an effective warning of the presence of H 2 S - continuous inhalation of low concentrations may cause olfactory fatigue. Exposure to H 2 S in concentrations greater than 500 ppm can result in unconsciousness, coma and death. Inflammation and irritation of the eyes can occur at very low airborne concentration (<10 ppm). Skin contact may cause irritation. 3. (2 points) The matrix and expected results are as follows: Cl - OH NH 4 OH CO 3 2- H 2 S S 2- Ag + Insol/Prec Insol/Prec Soluble Insol/Prec Insol/Prec Insol/Prec Hg 2 2+ Insol/Prec Insol/Prec Insol/Prec Insol/Prec
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This note was uploaded on 10/16/2010 for the course CHEM 6B taught by Professor Crowell during the Spring '08 term at UCSD.

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5 Post- + Pre-Lab Answer Keys - ANSWER KEY: EXPERIMENT #5...

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