Chapter 3 Flashcards
Polar covalent bonds in water make a……
Hydrogen bond which is polar
What’s water cohesion?
The strong attraction for molecules to attach to molecules of the same kind → water has strong cohesion because of hydrogen bonding
Surface tension
Arises die to cohesion attraction in water which causes the liquid to be pulled equally in all directions causing a net force of zero
When hydrogen bonds are created or when heat is added, heat is…
Absorbed until hydrogen bonds break → cause for water’s high specific heat
Benefit of water’s high specific heat
Helps keep temperature steady enough for life to live in
Evaporative cooling property of water
The fast moving water particles that generate neat evaporate into a gas leaving the slower moving molecules liquid which drives down the temp
Benefit of water being more dense than ice
Allows for life to live under sheets of ice
Why is water a good solvent
The polar molecules in water are attracted to cons/polar substances that can form hydrogen bonds
Hydrophilic
Have an affinity for water
Hydrophobic
No affinity for water
Molarity
Used to measure a solute concentration in solutions
M=moles of solute/Liters of solution
Mole mass is in…..
Grams
Emergent properties of water
Cohesion, surface tension,high specific heat and evaporative cooling
Formula for ph
pH= -log[H+]
Buffer
An acid-buse pair that combines reversible with hydrogen ions allowing it to resist put changes
