01:119:115 Lecture Notes - Lecture 2: Hydrophile, Electron Affinity, Hydrophobe
21 Apr 2016
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Science - finding natural explanations for natural phenomena: systematic process. A. 3. b) proposed tentative explanations must be testable and falsifiable. Theory - broad explanation with support, leads to new hypotheses and predictions. Law - states something always occurs under certain conditions. Chemical concepts (what happens, not why: electrons - subatomic particles with a -1 charge. Have potential energy (energy possessed due to its location) A. 1. b) can be used - capacity to cause change work must be done to get energy back. A. 2. a) far from nucleus = more potential energy, because e- is attracted to nucleus so more work to do to reach the nucleus. Chemical bonds - energy is stored in chemical bonds, each bond represents a certain amount of energy: electronegativity - tendency to attract electrons. A. 1. high electronegativity = high electron affinity: types of bonds (strongest to weakest bonds) Weak in water (ions react with h2o molecules. Weak individually, strong in great numbers: hydrogen bonding in water.
