Chemistry 104 Laboratory
	This Week
Answer Keys Gen Chem Lab Periodic Table	· Expt 4: Green Chemistry, Biodiesel (Parts C, D)
	Next Time
	· Expt 1: Brita, Scum and Scale (Part A) · Quiz 2: Expts 2, 11
	Notes for Today
	Goal: Determine Conditions for Producing Good-Quality Biodiesel Review: Biodiesel Synthesis Reaction Tests for ‘Quality’ of Biodiesel Density How to measure What does it mean if density is ‘high’? ‘low’? Viscosity What is it? (Ref: Section 1.14 in your text) How to measure Why viscosity matters in engine performance proper viscosity too viscous = large droplets Emulsion Test impure oil oil+water emulsion What causes an emulsion to form? What does presence/absence of emulsion tell you? Fuel Value Comparable to...? petrodiesel (~45 kJ/g) methanol (~20 kJ/g) soy oil (~30 kJ/g) Bomb Calorimetry Safety and Waste Disposal Wear goggles at all times Methanol, oil, and biodiesel are flammable Collect glycerol and (non-emulsified) biodiesel for recycling Glycerol for soapmaking Biodiesel for fueling oil lamps