BSC 2010C Lecture Notes - Lecture 3: Acid Rain, Ph, Heat Capacity
Document Summary
Special properties of water: cohesion, adhesion, surface tension, high specific heat, high heat of vaporization: it takes a great amount of energy to convert water from liquid to gas. This helps moderate earth"s climate: water expands when it freezes, water is a solvent. Acids and bases: hydrophobic: repelled by water; mostly non-polar substances, hydrophilic: water loving or attracted to water. Most of these compounds are polar or charged: acid: substance which increases the h ion in a solution, base: substance that accepts h ions or donates oh. Bases reduce the h ion concentration of a solution: ph. Negative log of the h ion concentration. ph goes down as h ion concentration increases. ph goes up as h ion concentration decreases. For every unit of increase or decrease, the ion concentration changes by a positive factor of 10. Acid rain is any ph below 5. 6.
