Biology 2.2
Solution
All components of a ______________ are evenly distributed throughout the solution.
Acid
Any compound that forms H+ ions in solution.
PH scale
Chemists devised a measurement system called the _________ to indicate the concentration of H+ ions in solution.
Solute
In a saltwater solution, table salt is the ________ substance that is dissolved.
Suspensions
Mixture of water and non-dissolved materials.
Solvent
Water is the _____________substance in which the solute dissolves
why are water molecules polar
a water molecule is polar because there is an uneven distribution of electrons between the oxygen an hydrogen atoms
What is the difference between a solution and a suspension?
all component are evenly distributed throughout a solution. mixtures of water and nondissolved materials are known as suspension.
Buffer
are weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in ph.
What are acidic solutions
contain higher concentration of h+ ions that pure water and have ph values below 7
compare in terms acidic and basis solutions in terms of their H+ ion and OH- ion concertrations
higher concentration of h+ ion than pure water and have ph values below 7 solution lower concentration of h+ ions than pure water and have ph values above 7
Bases
is a compound that produces hydroxide ion (OH ions) in solution.
Mixture
is a material composed of two or more elements or compounds.
Adhesion
is an attraction between molecules of different substances.
Cohesion
is an attraction between molecules of the same substance.
What does PH measure?
measures the concentration of h+ ions in solution measures the concentration of h+ ions in solution
what are basic solutions
solutions contain lower concentrations of h+ ion than pure water and have ph values above 7
Use the structure of a water molecule to explain why it is polar
there is an uneven distribution of electrons between the oxygen and hydrogen atoms