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acid-base indicators

compounds whose colors are sensitive to pH (color of an indicator changes as the pH of a solution changes)

transition interval

the pH range over which an indicator changes color

pH meter

determines the pH of a solution by measuring the voltage between the two electrodes that are placed in the solution


the controlled addition and measurement of the amount of a solution of known concentration required to react completely with a measured amount of a solution of unknown concentration

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

standard solution

the solution that contains the precisely known concentration of a solute

primary standard

a highly purified solid compound used to check the concentration of the known solution in a titration

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