Campbell University Chemistry 111
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Accuracy | the extent to which a given measurement agrees with the standard value for that measurement
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| Precision | exactness; to arrive at an estimate with precision you can be precise but not accurate
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| Meniscus | the convex or concave upper surface of a column of liquid, the curvature of which is caused by surface tension eye level
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| Volume by displacement | for objects that are irregular shaped, using a graduated cylinder. Fill the cylinder up with water or so that it will at least cover the object. Take an initial reading, add the objects and take a final volume reading
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| "Best Straight Line" | data set trend
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| Density | mass/volume
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| Chemical Property | displayed when a substance undergoes a chemical reaction to produce products
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| Physical Property | color, state (solid, liquid or gas), density and melting and boiling points. the property of a substance without changing it
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| Solubility | the amount of a substance that dissolves in a given volume of solvent at a given temperature
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| Malleability | degree to which shaping is possible
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| Conductivity | the ability of a solution to conduct electricity; this property indicates the pressure of ions
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| Electrolyte | a material that dissolves in water to give a solution that conducts an electric current
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| pH | a measure of the acidity or basicity of an aqueous solution
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| Starch Test | adding two drops of iodine solution. if starch is present, a blue black color will develop
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| Hydrate | a solid compound containing water molecules combined in a definite ratio as an integral part of a crystal
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| Dehydration | a chemical reaction that involves the loss of water from the reacting molecule
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| Anhydrate | a compound that can be considered as derived from another compound by subtracting the molecules of water
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| Crucible | a refractory container used for metal, glass and pigment production
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| Precipitate | a solid that forms out of solution. to separate (a substance) in solid form a solution, as by means of a reagent
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| Alum | a crystalline solid, aluminum potassium sulfate, used in medicine as an astringency and styptic, in dying and tanning and in many technical processes
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| Filtration | a method for separating the components of a mixture containing a solid and a liquid
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| Filtrate | to filter; liquid that has been passed through a filter
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| Titration | a technique in which one solution is used to analyze another
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| Indicator | a chemical that changes color and is used to mark the end point of a titration
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| Endpoint of a Titration | the point of the titration at which the indicator changes color
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| Neutralization Reaction | an acid base reaction
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| Primary Standard | are made from compounds that have a relatively high molar mass and are readily available at relatively low cost and high purity
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| Secondary Standard | lack at least one of the criteria to make them primary standards
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| Titrant | the solution which is delivered in incremental amounts from the burrette it can be an acid or a base
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| % (m/m) | (mass of vitamin C in the tablet/ total mass of tablet) x 100%
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| Vitamin C | ascorbic acid HC6H7O6
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| Basic | a solution that contains excess OH-
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| Electromagnetic Radiation | radiant energy that exhibits wavelike behavior and travels through space at the speed of light in a vacuum
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| Wavelength | the distance between two consecutive peaks or troughs in a wave
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| Frequency | the number of waves (cycles) per second that pass a given point in space
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| Photon | a quantum of electromagnetic radiation
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| Planck's Constant | the constant relating the change in energy for a system to the frequency of the electromagnetic radiation absorbed or emitted
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| Spectrophotometer | device for measuring light
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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