BIO 202 Lecture Notes - Lecture 3: Gastric Acid, Heat Capacity, Dynamic Equilibrium

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Be able to describe how to prepare a solution of a given molarity and volume: molecular weight (mass, mole, molarity, define acid, base, and ph. Explains how water drops form: at the surface, water molecules are hydrogen-bonded to the water molecules below them, making the surface difficult to disrupt, water transport in life, transpiration. Sodium (na), atomic mass = 23 amu, 1 mole = 23 g: for a compound molar mass mass of component atoms, ex. H+ concentration will drop to 10^-10 m: ph = -log [h+, neutral ph = 7 (-log[10^-7]) Gastric juice: buffers, buffers are solutions in which the ph remains relatively constant when small amounts of acid or base are added, carbonic acid-bicarbonate buffering system (buffer in blood, ex. Co2 and increased h+ in the oceans: coral is made of calcium carbonate, caco3. The increase in h+ makes less carbonate ion available for coral reefs, which has ecological and environmental impact: learning objectives.

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