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Why is significant about water in liquid form?
It has 1/20 strength of a covalent bond, allowing it to form, break, and reform.
What are the energy levels of H2O in frozen and liquid form?
- Frozen = hydrogen bonds are stable
- liquid = hydrogen bonds are constantly breaking and reforming
What is cohesion?
structural, allows aid in plants by adhesion, high surface tension
allows plants to transport water against gravity
Water in hydrogen bonding?
- heat is absorbed = hydrogen bonds break
- heat is released = hydrogen bonds form
What is a solution?
Liquid that is a completely homogeneous mixture of two or more substances (e.g., sugar/salt in H2O)
Dissolving agent (H2O is solvent in aqueous solutions)
Substance dissolved in solvent
Difference between hydrophobic/hydrophilic?
- Phobic = Water HATING
- Philic = Water LOVING
polar + ionic, molecules that contain polar or ionic regions
nonpolar + nonionic, molecules that have nonpolar + nonionic properties
contains BOTH hydrophilic and hydrophobic parts (ex: lipids)
0 - 14, 0 = acidic, 14 = basic
substance that increases H+ concentration of a solution
substance that reduces H+ concentration of a solution
pH range of biological fluids?
6 - 8 pH
proton donors (ex: acetic acid CH3CO2-)
proton acceptors (Ex: ammonia NH3)
substance that minimizes changes in concentrations of H+and OH– in a solution, Contains both a weak acid (HA) and its conjugate base (A-)
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