5.4 Flashcards
Define cohesion
Bonding between H2O molecules.
Define adhesion
Bonding between H2O molecules & other substances.
Define solvent
Something that causes another substance to dissolve.
Define specific heat
The amount of energy it takes to heat up 1 gram of a substance by 1 degree Celsius.
Define heat of vaporization
The amount of energy it takes for water to evaporate to become water vapor, hydrogen bonds must be completely broken.
Define concentration
The specific amount of a solute in a solution.
Define pH
pH stands for potential hydrogen, it measures the acidity of a substance.
Define pOH
pOH is the hydroxide ions in a substance.
Define hydroxide ion
OH.
Define hydronium ion
H3O.
Define acid
An acid is 0-6 on the pH scale.
Define base
A base is 8-14 on the pH scale.
What are the five properties of water?
Cohesion & adhesion, solvent, more dense than ice, high specific heat, heat of vaporization.
How do water’s polarity and ability to form hydrogen give it those properties?
Water’s strong polarity allows it to form strong bonds with other substances and the hydrogen bonds let it form strong bonds with itself.
In what ways are the properties of water important to living things?
Surface tension lets some animals walk on water, it is vital for the transportation of nutrients, ice melting makes it travel through the warmer water and cycle nutrients, its high specific heat makes temperatures stay close to the same throughout years, and sweating is used to cool animals down
