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Chemistry Lab Final Study Guide
1. Precision: Reproducibility (A precise measurement is close to other values ob- tained in the same
way)
2. Accuracy: Correctness (An accurate measurement is close to the true value or the accepted value if
the true value is unknown)
3. Standard Deviation: Measures how closely the individual values are clustered around the mean
(average)
4. Hydrate: A crystalline compound in which one or more water molecules are combined with
each formula unit of salt.
5. Water of hydration: The water molecule(s) in a hydrate.
6. Efflorescence: Compounds lose water of hydration spontaneously.
7. Titration: A technique used to determine the concentration of a substance (ana- lyte) in a solution by
reacting it with a known volume and concentration of another substance.
8. Endpoint: The point in titration where the reaction between the analyte and titrant is complete,
often indicated by a visible change in the indicator.
9. Equivalence Points: The point in a titration where the stoichiometrically equiva- lent amounts of the
analyte and titrant have reacted.
