BIOL 1001 Lecture Notes - Lecture 5: Chemical Polarity, Drain Cleaner, Logarithmic Scale

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Special properties of water: temperature stabilizing - has high specific heat, high surface tension - cohesive due to hydrogen bonding, good solvent - polarity of water allows it to dissolve polar molecules, water loving molecules = polar molecules. Buffer systems: minimize shifts in ph, partnership between a weak acid and base it forms when dissolved, example of weak base = canonic acid in blood. When blood ph rises above 7. 40, this happens: Salts: compounds that release ions other than h+ (protons) and oh- (hydroxyl groups) when dissolved in water, ex. Nacl releases na+ and cl: cacl2 is rock salt, and releases ca2+ and 2 cl- ions, many salts dissolve into ions that play important biological roles these coins can act as blood electrolytes. Acid and base yield a salt and water: hcl + naoh > nacl + h20, hcl = hydrochloric acid, naoh = sodium hydroxide (a base, nacl = sodium chloride (a salt)

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