5.4 bio

Question 1

Cohesion

Answer 1

the action or fact of forming a united whole.

Question 2

adhesion

Answer 2

the action or process of adhering to a surface or object

Question 3

solvent

Answer 3

A solvent is a substance that dissolves a solute, resulting in a solution

Question 4

specific heat

Answer 4

the heat required to raise the temperature of the unit mass of a given substance by a given amount

Question 5

heat of vaporization

Answer 5

heat absorbed when a liquid vaporizes.

Question 6

Concentration

Answer 6

a close gathering of people or things.

Question 7

pH

Answer 7

logarithmic scale used to specify the acidity or basicity of aqueous solutions.

Question 8

pOH

Answer 8

a scale used to determine the hydroxide ion (OH–) concentration in a solution

Question 9

hydroxide ion

Answer 9

a diatomic anion with chemical formula OH−

Question 10

hydronium ion

Answer 10

The product of H 3 O +

Question 11

acid

Answer 11

any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance.

Question 12

base

Answer 12

A base is a molecule or ion able to accept a hydrogen ion from an acid.

Question 13

Listing the five properties of water

Answer 13

• excellent solvent
• cohesion + adhesion
• Ice is less dense than liquid water
• High specific heat
• Heat of evaporation

Question 14

Explain how water’s polarity or ability to make hydrogen bonds gives it each property

Answer 14

each water molecule attracts other water molecules because of the opposite charges between them, forming hydrogen bonds.

Question 16

Living things to properties of water

Answer 16

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.

Question 17

what is the pH

Answer 17

acidic- under 7
neutral- 7
base- 7+

Question 18

Compare the concentrations of [H3O+] and [OH-] of solutions with two different pHs

Answer 18

Adding an acid to water increases the H3O+ ion concentration and decreases the OH- ion concentration.
Adding more concentration does not change anything.