5.4 bio Flashcards
Cohesion
the action or fact of forming a united whole.
adhesion
the action or process of adhering to a surface or object
solvent
A solvent is a substance that dissolves a solute, resulting in a solution
specific heat
the heat required to raise the temperature of the unit mass of a given substance by a given amount
heat of vaporization
heat absorbed when a liquid vaporizes.
Concentration
a close gathering of people or things.
pH
logarithmic scale used to specify the acidity or basicity of aqueous solutions.
pOH
a scale used to determine the hydroxide ion (OH–) concentration in a solution
hydroxide ion
a diatomic anion with chemical formula OH−
hydronium ion
The product of H 3 O +
acid
any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance.
base
A base is a molecule or ion able to accept a hydrogen ion from an acid.
Listing the five properties of water
- excellent solvent
- cohesion + adhesion
- Ice is less dense than liquid water
- High specific heat
- Heat of evaporation
Explain how water’s polarity or ability to make hydrogen bonds gives it each property
each water molecule attracts other water molecules because of the opposite charges between them, forming hydrogen bonds.
Living things to properties of water
Cohesion and Adhesion
- Both help water flow upwards
Water is solvent of life
- Vital for transport of nutrients
Ice is less dense than liquid water
- surface ice insulates water below
High specific heat
- Inland will change more daily and over months, on the coast the water stabilizes temps
Heat of Vaporization
- Sweating takes heat off the body ultimately cooling the body.
what is the pH
acidic- under 7
neutral- 7
base- 7+
Compare the concentrations of [H3O+] and [OH-] of solutions with two different pHs
Adding an acid to water increases the H3O+ ion concentration and decreases the OH- ion concentration.
Adding more concentration does not change anything.
