Properties of water + hydrogen bonding Flashcards
what are water molecules
polar covalent, as oxygen is slightly more negative than hydrogen
what bond will form between water molecules
hydrogen bond
what bond will form in side of water (between oxygen and hydrogen)
covalent
what results to polar covalent bonding
unequal sharing of electrons
why is water cohesive
- hydrogen bonds between the water molecules make them stick together
- polarity
what is cohesion
when the same type of molecules are attracted to each other
what does water’s cohesive properties explain
- WHY WATER IS ALLOWED TO ACT AS A TRANSPORT MEDIUM FOR DISSOLVED SUBSTANCES AND NON POLAR SUBSTANCES
- SURFACE TENSION
why water forms into droplets when its split
- why water has a surface tension that allows some organisms to walk to water
- how water is able to move as a water column in the vascular tissues of plants
what is adhesion
any attraction between two unlike molecules
why does water have adhesive properties
- because of the hydrogen bonding and polarity of water
- water tends to stick to other polar substances with hydrogen bonds
EXAMPLE: makes water a good transport medium and SOLUBLE
what are common uses of water
- coolant
- surface tension
- transport medium
- medium for metabolic reactions
why does water have thermal properties
- high specific heat capacity (large amount of heat required to cause an increase in temperature
- high latent heat of vaporization ( a large amount of heat energy required to evaporate water)
- water can absorb a lot of heat during evaporation
why are water’s thermal properties important
- temperature stabilization in living organisms
- used as a cooling mechanism
- coolant/sweating
- can absorb thermal energy as a byproduct of chemical reactions
- so that the oceans don’t evaporate
what are waters solvent molecules
- water is a solvent of POLAR substances
- like dissolves like
why are waters solvent properties important
- can dissolve organic and inorganic substances to facilitate chemical reactions
why can water transport well
because of its solvent properties
how does solubility in water affect the mode of transport of molecules in organisms
- because of their different polarities, each type of substance has a different solubility
- water acts as a mode of transport
molecules
- glucose
- amino acids
- cholesterol
- fats
- oxygen
- sodium chloride in blood
how does glucose convey with water
- it a polar moleculle= high solubility
amino acids + water
- varying polarity but reasonability soluble
chlorestol and water
- non polar, therefore low solubility
fats
non polar= low solupbility
oxygen
low solubility, travel as diatomic O2
sodium chloride
high solubility, its ionizes in water and separates into Na+ and Cl- in an aqueous plasma
HOW do the non soluble molecules travel in water
= through blood proteins that have polar amino acids on the portion to give water solubility and non polar amino acids to pint to the non polar molecules (like the cell membrane)
