Biology Water Flashcards
(22 cards)
Polar molecules attract other _______.
Polar molecules
Do polar and nonpolar molecules mix?
No.
Molecule
two or more elements chemically bonded together
Chemical Formula
shows the number of elements in a molecule
Chemical Bond
an attraction between atoms
Covalent Bond
strong bond, holds O and H atoms together in a water molecule.
Hydrogen Bond
weak bond, forms between water molecules, constantly break and reform.
Polar Molecule
a molecule that has positive and negative charges. Ex: Water
Nonpolar Molecule
A molecule that does not have any electrical charge. Ex: Oil and Alcohol.
Cohesion
attraction between molecules of the same substance, creates surface tension.
Adhesion
attraction between molecules of different substances.
Capillary Action
water rises against the force of gravity.
Heat Capacity
the amount of energy it takes to raise a substance 1 degree celsius.
Does water have a high heat capacity?
Yes. A high heat capacity causes water to change temperatures very slowly.
What is the universal solvent?
Water. Able to dissolve compounds and other polar substances.
Solution
a mixture in which a solute is uniformly distributed through the solvent.
Solvent
able to dissolve other substances
Solute
the compound that gets dissolved.
Water Density
water is less dense as a solid than a liquid.
Does ice float?
Yes
Hydrophobic
substances that do not mix well with water. Ex: Oil and Water
Hydrophilic
substances that mix well with water. Ex: Salt and Water
