BIOL 1201 Chapter : Biology 1
Document Summary
1/24/2012 4:11:00 pm: water is most dense at 4 degrees, this is because of the hydrogen bonding structure, ice is lighter than water. Neutrality: [h+]=[oh-, ph=poh beginning with a solution of ph 8 you increase the [h+] by a factor of 1,000 what is the new ph of the solution, 1,000- 3 orders of magnitude increase, new ph 8-3=5ph. Buffers: substance that maintain a constant ph. Solubility: solute, molecules that are dissolved in the solvent, solvent. What determines the solubility of a molecule: similarity of the solute and solvent. What determines solubility: like dissolves like, like in terms of polarity, polar solutes dissolve in polar solvents, non-polar solutes dissolve in non-polar solvents, hydrophilic substances interact with water molecules. Hydrogen bonding is responsible for the unusual properties of water. Biological molecules: except for water, all are built on carbon skeleton, water, carbohydrates, lipids, proteins, nucleic acids.
