Chem 1LD Experiment 1-Solubility and Miscibility/Comp Study with correct answers 100%

Chem 1LD Experiment 1-Solubility and Miscibility/Comp Study with correct answers 100% In-Lab Safety - Correct Answer Fume hood safety 1. Why is odor fatigue dangerous in lab? -students may not realize they are being exposed to chem bc they can no longer smell it 2. Which of given procedures is NOT pt of working in fume hood safely? -the sash should be pushed up as high as possible to inc airflow through the hood Part A: Miscible Liquids: Are Volumes Additive? PROCEDURE - Correct Answer -weigh 10-mL vol flask and stopper -fill w DI water and weigh -pour EtOH into 100-mL beaker; pipet EtOH from beaker into 10-mL vol flask; weigh flask -prepare "15 + 5" EtOH+H2O; fill 10-mL flask w soln and weigh -repeat ^ w "10+5, 10+10, 5+10, 5 +15, 10+1, and 15+2; weigh -repeat ^^ w X+X Heptane+Acetone soln; weigh Part A: Miscible Liquids: Are Volumes Additive? CALCULATIONS - Correct Answer Calc mass of water in 10 mL flask: - m = mass of flask w. Water - mass of empty flask Calc density of water in 10mL flask: -D = m/V Calc mass of EtOH in 10mL flask: -m = mass of flask w EtOH - mass of empty flask Calc density of EtOH -D = m/V Calc mass of each mix in 10 mL vol flask: -m = mass of flask w liquid - mass of empty flask Calc density of each mixture in 10mL vol flask: -D = m / vol flask vol Calc mass of each mix in E. Flask: -m = (VolEtOH)(DEtOH) + (VolH2O)(DH2O) Calc actual vol of each mix in E. Flask: -vol = mE/Dmix