Topic 1.1 - Structure of Water and Hydrogen Bonding 𖦹⋆｡°✩ Flashcards
what do the subcomponents of biomolecules determine
they determine the properties of that molecule
what two elements is water made of and in what ratio?
water is made of oxygen and hydrogen in a 1:2 ratio (h2o)
what type of bond describes when atoms share electrons
a covalent bond
which atom in water is more electronegative and what is its effect
oxygen is more EN compared to hydrogen, resulting in an unequal sharing of electrons between oxygen and hydrogen
what results in polarity
covalent bonding, when there are differences in atomic ENs
what is an example of a polar molecule
water
what is a hydrogen bond
a weak bond interaction between the negative and positive regions of two separate molecules
what can water molecules form hydrogen bonds with
༻ other water molecules
༻ other charged molecules
what is cohesion
when two of the SAME molecules form hydrogen bonds with each other
what is adhesion
when two DIFFERENT molecules form hydrogen bonds with each other
what does water’s cohesive property allow for
༻ it allows for unique hydrogen bond interactions to occur when water is in a solid state, making ice less dense than liquid water
༻ it allows water to absorb a lot of thermal energy before changing chemical states, resisting sudden changes in temperature
what is capillary action
a result of both the cohesive and adhesive properties of water
