Biology: Section 2-2 Properties Of Water (40-43)

homogeneous

a mixture of two or more substances in which the molecules of the shbstances are evenly mixed

mixture

any conbination or blend of different elements

why is water neutral despite the production of hydrogen ions and hydroxide ions?

because th number of positive hudrogen ions produced is equal to the number of negative ions produced

what is an acid

chemic substance that neutralizes alkalis

H2O

greatest solvent in the world

what does the pH scale indicate?

how acidic or basic a substance is

why is a water molecule polar

it is polar because there is an uneven distribution of electrons between the oxygen and hydrogen atoms

suspension

mixture containing aolid particles

saline

solution if sodium chloride saltwater solution: water

what are buffers?

solution that resists changing in pH

solute

substance that creates a solution when dissolved in solvent

hydrogen bond

the attraction between the hydrogen atom on one water molecule and the oxygen atom on another water molecule is an example

adhesion

the tendency of dissimilar particles or surfaces to cling to one another

true or false: A water molecule is neutral

true

cohesion:

when two covalent bonds stick together