ap bio water and hydorgen bonding Flashcards
water has what type of bonds?
. polar covalent bonds
. hydrogen bonds
what elements does water have?
2 elements of hydrogen and one oxygen
oxygen has what charge?
negative
hydrogen has a what charge?
partial positive
hydrogen bond:
forms btwn positive hydrogen and negative oxygen
what causes polar molecules?
uneven distribution
in liquid
hydrogen bonds break and reform
in solid/frozen
hydrogen bonds are stable, farther apart, less dense ( why ice floats)
cohesion
water is attracted to water
cohesion example
allowing the water droplets to stick together in a stream to go up the roots
adhesion
water attracted to other polar or charged things
adhesion example
allows the water molecules to stick to the plant walls
transpiration
loss of water from a plant due to water vapor
hydrophilic
attracts water
hydropobic
avoids water