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Chem Lab Final

Accuracy Agreement of a particular value with the true value
Precision Agreement among several measurements of the same quantity; reproducibility of a measurement
Meniscus The curved upper surface of a liquid in a tube
Volume by displacement A way to find the volume of an irregular shaped object Final Volume-Initial Volume=Displaced Volume
"Best Straight Line" Linear relationship of mass and volume
Density Amount of substance per unit volume Mass/Volume
Chemical Property Displayed when a substance's identity changes
Physical Property Things like color, state, density, mass, and melting/boiling points
Solubility Ability of a substance that dissolves in a given volume of a solvent at a given temperature
Malleability Capable of being altered or controlled by an outside source or influence
Electrolyte Water soluble material that generates ions in water
pH How acidic or basic a substance is
Starch Test Test for the presence of starch in which the sample turns blue-black in color when potassium iodide is added.
Hydrate Salts that contain water as a part of their structure
Dehydration Two hydrogen atoms are removed from adjacent carbons of a saturated hydrocabon giving an unsaturated hydrocarbon
Anhydrate The salt that is left after dehydration
Crucible Ceramic container where metal or other substances can be melted or subjected to very high temperature
Precipitate Solid formed in a solution
Alum Special type of ionic compound referred to as a double salt. Used in the preparation of food products, tanning of leather and paper making
Filtration A liquid that has been passed through a filter
Titration Analytical technique where a reaction is carried out with a controlled addition of one reactant to another until both are consumed.
Indicator Dye that changes colors depending on the composition of a solution into which it is placed.
Endpoint of Titration Where the titration stops; Visualization of endpoint of reaction occurs by the indicator
Equivalence Point of Titration When the number of moles of a base in the titrant will completely react with the number of moles in the acid.
Neutralization Reaction Acid-Base Reaction
Primary Standard Made from compounds that have a relatively high molar mass and are readily available at low cost and high purity
Secondary Standard Lack at least one of the criteria to make them primary standards.
Titrant Solution which is delivered in incremental amounts from the burette
% (m/m) mass of vit C tablet/ total mass X 100%
Vitamin C Ascorbic Acid; (HC6H7O6); needed for metabolic reactions in plants and animals.
Basic Containing excess (OH-)
Photon Particle of light
Cation Positive Ion
Anion Negative Ion
Filtrate Liquid left after filtration
Created by: hhorwath