BIOL 102 Lecture Notes - Lecture 4: Hydrogen Bond, Structural Isomer, Partial Charge
Document Summary
Ph scale: (stands for power of hydrogen or potential of hydrogen) measure of acidity or alkalinity of water soluble substances. 7 is the most neutral point: this balance occurs because the dissociation of water produces equal amounts of h+ and oh- Acid: any substance that dissociates in water to increase the h+ (lowers the ph) Base: any substance that combines with h+ when dissolved in water (raises the ph) Buffers help cells maintain homeostasis through keeping the same ph level of 7 even when acids or bases are added, buffer range = 4-6. Buffer: a substance that resists changes in ph. Release hydrogen ions when a base is added and absorb hydrogen ions when acid is added. Charge of a hydroxide ion = -1. Charge of a hydrogen ion = +1. Biological systems obey all the laws of chemistry; chemistry forms the basis of living systems.
