| Term | Definition |
|---|
| acid-base indicator | a substance that changes in color depending on the pH of the solution that the substance is in |
| end point | the point in a titration at which a marked color change takes place |
| equivalence point | the point at which the two solutions used in a titration are present in chemically equivalent amounts |
| pH | a value that is used to express the acidity or alkalinity of a system |
| 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 |
| pOH | the negative of the common logarithm of the hydroxide ion concentration of a solution |
| primary standard | a highly purified solid compound used to check the concentration of a known solution in a titration |
| self-ionization of water | a process in which two water molecules produce a hydronium ion and a hydroxide ion by transfer of a proton |
| standard solution | a solution of known concentration, expressed in terms of the amount of solute in a given amount of solvent or solution |
| titration | a method to determine the concentration of a substance in solution by adding a solution of known volume and concentration until the reaction is completed |
| transition interval | the range in concentration over which a variation in a chemical indicator can be observed |
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