Unit 5.4 Flashcards
What is the definition of cohesion?
Bonding between H2O molecules
What is the definition of adhesion?
Bonding between H2O and other substances
What is the definition of a solvent?
Solvents are something that is able to dissolve solutes
What is the definition of a specific heat?
The amount of energy it takes to heat up 1 g of a substance by 1 degree celcius
What is the definition of heat vaporization?
The heat that absorbs when a liquid vaporizes
What is the definition of concentration?
The density of solute, solute/volume.
What is the definition of pH?
Potential Hydrogen, it measures H3O+ on a logarithmic scale
What is the definition of pOH?
Potential hydroxide, it has the same relationship to hydroxide as pH has to H3O+
What is the definition of hydroxide ion?
An ion that looses a hydrogen bond
What is the definition of a hydronium ion?
A ion that gains a hydrogen bond
What is the definition of acidic?
Something is acidic if it has a pH lower than 7.
What is the definition of basic?
Something is basic if it has a pH higher than 7
List the five properties of water
High boiling and melting points, High specific heat, High surface tension, ability to dissolve many substances.
Explain how water’s polarity or ability to make hydrogen bonds gives it each property
Because of all the hydrogen and oxygen they can absorb a lot of heat and also cool a lot too. The atoms can also spread out a lot, which gives them a high surface temperature, and it can dissolve things cause it has a neutral pH.
Give an example of why each property is important to living things
It helps the substance sustain a variety of temperatures, and keep its surface sturdy. It is also able to keep things alive in it if there are things living.
