Chapter 2 Flashcards
Isotopes are atoms of the same element which differ in the number of ?
Neutrons
Low pH =
Higher concentration of H+ Ions
Name a few properties that are a consequence of water being able to form hydrogen bonds
cohesion
high specific heat
adhesion
ability to function as a solvent
If a molecule loses an electron it had been…?
Oxidized
weakest chemical bond
hydrogen bond
Paleontologists distinguish rocks from dinosaur bones by touching their tongues to the object. If their tongue sticks, it is considered bone. This occurs because the water from the tongue moves up the porous spaces of bone. What property of water is allowing this to occur?
capillary action
A water strider is an insect that can walk on water. How is this possible?
Surface tension
When monomers are combined to make polymers, water is removed. This is called a…?
dehydration reaction
When H2CO3 is added to water, some of it dissociates into H+ and CO3-, but much remains as H2CO3. This means that H2CO3 is…?
a weak acid
Which of these is responsible for the surface tension of water?
The hydrogen bonds between different water molecules
Capillary action is due to
adhesive forces
cohesive forces
hydrogen bonds
A solution with a pH of 3
is acidic
Had a large number of hydrogen ions in solution
Hydrangeas are often pink in Pennsylvania and blue in North Carolina. This is likely because
The soil in Pennsylvania is more basic
Why is bicarbonate a good buffer in human blood?
it can both bind to and release hydrogen ions
You have a solution with a pH of 3 and you want it to have a pH of 7. To get it to do this you should add
A strong base
