Vital Properties of Water

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Presentation transcript:

Vital Properties of Water Solvency hydrophilic  polar hydrophobic  nonpolar

Vital Properties of Water Solvency Cohesion surface tension adhesion

Vital Properties of Water Solvency Cohesion Thermal stability

H2O  H+ + OH- Ionization of Water [H+] & [OH -] is 10-7 M in pure water

Acids and Bases Acid = proton donor HCl  H+ + Cl- H2SO4  H+ + HSO4-

NaOH  Na+ + OH- KOH  K+ + OH- H+ + OH-  ? Acids and Bases Base = proton acceptor NaOH  Na+ + OH- KOH  K+ + OH- H+ + OH-  ?

1 [H+] log pH =

Buffers Allow solutions to resist changes in pH HCO3- is a major buffer in nature

Macromolecules Large molecules such as carbs, lipids, proteins, nucleic acids Built as polymers

Functions of Carbohydrates Supply C atoms for building macromolecules Energy source Energy storage Structural components (plants)

hexoses: C6H12O6 can act as monomers and be linked (bonded) together

Structural Isomers