Frank Gervasi 10/11/10 Experiment 5 1. Lead: Pb, Iron: Fe, Fluorine: F, Potassium: K 2. KBr: 119 g/mol, NiCO3 : 118.7 g/mol 3. A substance formed by the reaction of two or more chemical elements. The elements in a compound are present in fixed ratios. 4.
Frank Gervasi Experiment 2 9/13/10
1. Color, Taste, Odor, Melting point, and Boiling Point 2. 1.22g/1.73cm3 = 0.7052g/cm3 3. Both lauric acid and stearic acid are solids at room temperature. 4. You cannot determine the density of zinc chloride using water
Frank Gervasi 9/27/10 Experiment 3 1. Concrete: heterogeneous mixture, Tomato juice: Pure substance, Marble: heterogeneous mixture, Seawater: homogeneous mixture, Iron: pure substance 2. A way to determine if a colorless mixture is pure water or a salt so
Frank Gervasi Experiment 28 Pre-Lab 11/1/10 1. Endothermic reaction: H>0 Exothermic reaction: H<0 2. (720mL)(1.0g/mL)(60.0C-10.0C)(4.18J/C) = 150,480J = 150kJ 3. The heat capacity of a substance is the amount of energy needed to raise an unspecified amoun
Frank Gervasi 10/18/10 Pre-Lab Experiment 7 1. It is unwise to haphazardly mix household chemicals because in the case of mixing ammonia and bleach, it would create a dangerous cloud of mustard gas. 2. NH4+ can be detected by adding sodium hydroxide, NaOH
Frank Gervasi Experiment 6 Pre-Lab 10/11/10 1. Redox: H2 + F2 2HF Metathesis: NaCl(aq) + AgNO3(aq) AgCl(s) + NaNO3(aq) 2. Reactions proceed to completion when one product is removed from the solution, such as the formation of gas or an insoluble substance