self ionization of water
the process by which 2 water molecules produce a hydronium ion and a hydroxide ion by the transfer of a proton
pH
the negative of the common logarithm of the [H3O+]
pOH
the negative of the common logarithm of the [OH-]
acid-base indicator
compounds whose colors are sensitive to pH
transition interval
the pH range over which an indicator changes color
ph meter
a device used to determine the pH of a solution by measuring the voltage between the two electrodes that are placed in the solution
titration
process used to determine the concentration of a solution (often an acid or base) in which a solution of known concentration (the standard) is added to a measured amount of the solution of unknown concentration until an indicator signals the end point
equivalence point
the point at which the two solutions used in a titration are present in chemically equivalent amounts
end point
the point in a titration at which an indicator changes color
no charge which means no electrolytes
Why is pure water a very weak electric conductor?
indicates the molecule's concentration
What does it mean when the formula of a particular ion or molecule is enclosed in brackets?
1 x 10^-7
What is the [H3O+] of pure water at 25 degrees Celsius?
as temp increases, concentration of H3O+ increases
Will the value of [H3O+] in pure water change when the temp increases or decreases?
amount and concentration of hydrogen in a measured solution
what does pH measure?
hydrogen power
meaning of pH
pH= -log[H3O+]
equation for solving for pH
when substance changes from being an acid to a base, or a base to an acid
what is mean by the transition interval of an indicator?
phenolthalein changes color when the pH changes to alter the acidity or basicity of the substance
explain how changes in pH affect the color of an indicator
use a pH meter to check the pH level as it changes from acidic to basic
without using an indicator, how can you determine the equivalence point of a titration experiment of the pH of solution
first slow and then it speeds up when reaching the point titration
can be observed about the rate of change of pH o f a solution near the end of solution
the substance has transformed into a either a base or acid from whichever it originally was
what is meant by the end point of a titration
role of an inidicator
it shows when it reaches the end point by bringing, he transferred could he handles 16