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Chem Lab Terms Fill In The Blanks

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In each blank, try to type in the word that is missing. If you've typed in the correct word, the blank will turn green.

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Term: ChelateDefinition: a compound containing a ligand (typically organic) bonded to a central metal atom at two or more .
Term: complexometric Definition: is a form of volumetric analysis in the formation of a colored complex is used to indicate the end point of a titration.
Term: titrationDefinition: a way to determine the contents of a substance .
Term: displacement Definition: Here the analyte is treated with an excess of a second metal bound to EDTA. The analyte ion the second metal from the EDTA complex
Term: Lewis Definition: electron pair
Term: Lewis Definition: electron pair
Term: Definition: an atom or group of atoms to whatever atom you are interested in
Term: ligandDefinition: ligand that to a metal ion through only one atom
Term: ligandDefinition: to the metal ligand through more than one ligand atom
Term: AliquotDefinition: portion that represents a
Term: aliquot Definition: portion of solution
Term: Definition: substance that is analysis (substance being measured)
Term: analytical Definition: concentration when you something and dissolve it→ the total number of moles in
Term: equilibrium Definition: the actual
Term: Definition: m/v
Term: Definition: solute/ L solution
Term: weightDefinition: molar mass ( mass of a molecule) calculated as the sum of the mass of each constituent atom by the number of atoms of that element in the molecular formula
Term: percentDefinition: weight / mL sample
Term: qualitative Definition: identifying what is in an
Term: analysisDefinition: identifying how much is
Term: analysisDefinition: mass of is measured to determine how much unknown was present
Term: analytical Definition: measure to 4 places
Term: Definition: used to titrate→ goes to 4 s.f. measures in
Term: Definition: drying in dessicator
Term: Definition: closed chamber containing drying agent—to keep dried
Term: direct Definition: directly on balance
Term: hygroscopicDefinition: / attracts moisture from air
Term: indirect Definition: weigh by difference—do not onto balance
Term: Definition: curvature of liquid caused by tension
Term: pipetDefinition: used to known amount of liquid- can go to 4 s.f.
Term: tareDefinition: 0 a
Term: top-loading Definition: to 2 decimal places
Term: volumetric Definition: calibrated to contain certain vol of liquid at 20 degrees celcius when bottom of in in the right spot
Term: parallax Definition: that occurs when your eye is not at the same height as the meniscus
Term: Definition: difference between delivered and volume
Term: determinate Definition: if measurement made same way (correctable)
Term: errorDefinition: (random )- from experiment
Term: precisionDefinition: reproducibility of replicate
Term: degrees of Definition: where n is number of data
Term: intervalDefinition: range of values in there is a specified probability of finding the true mean
Term: distributionDefinition: characterized by a mean and standard deviation—mean is of distribution and standard deviation is width→ (bell shaped curve)
Term: student’s t Definition: statistical tool used to express confidence intervals and to results from different experiments
Term: Absorbance→Definition: most useful quantitity for chemical analysis (A)—higher the
Term: absorbance Definition: graph showing how A (or ) varies with wavelength Beer's law→
Term: curve→Definition: absorbance at one wavelength is plotted against different in a series of standards
Term: Definition: cell has flate
Term: absorptivity→Definition: by epsilon
Term: Definition: the use of electromagnetic radiation to measure chemical
Term: transmittance Definition: the fraction of incident light that passes through a T=(P/Po)
Term: wavelength→→Definition: crest- to- crest distance waves
Term: AliquotDefinition: that represents a whole
Term: factorDefinition: of total solution
Term: analyteDefinition: substance that is undergoing analysis (substance measured)
Term: analytical Definition: concentration when you something and dissolve it
Term: concentrationDefinition: the concentration
Term: Definition: m/v
Term: molarityDefinition: solute/ L solution
Term: molecular Definition: molar mass ( mass of a molecule) calculated as the sum of the mass of each atom multiplied by the number of atoms of that element in the molecular formula
Term: percentDefinition: weight / mL sample
Term: analysisDefinition: identifying what is in an
Term: analysisDefinition: how much is present
Term: gravimetric Definition: mass of is measured to determine how much unknown was present
Term: analytical Definition: to 4 decimal places
Term: Definition: used to
Term: desiccantDefinition: drying agent in
Term: Definition: closed containing drying agent—to keep samples dried
Term: weighingDefinition: place directly on
Term: Definition: absorbs/ moisture from air
Term: indirect Definition: weigh by difference—do not onto balance
Term: Definition: of liquid caused by surface tension
Term: Definition: used to known amount of liquid- can go to 4 s.f.
Term: tareDefinition: 0 a
Term: top-loading Definition: measures to 2 decimal
Term: flaskDefinition: calibrated to contain certain vol of liquid at 20 degrees celcius when bottom of meniscus in in the spot
Term: parallax Definition: error that occurs when your eye is not at the same height as the
Term: Definition: difference delivered and desired volume
Term: determinate Definition: if measurement made same way (correctable)
Term: indeterminate Definition: (random error)- from
Term: precisionDefinition: of replicate deliveries
Term: relative relative uncertainty?Definition: (Absolute uncertainty/magnitude of )
Term: precision (rsd)Definition: measurement of how close measurements are to each
Term: systematic Definition: error in process or
Term: degrees of Definition: (n-1)
Term: intervalDefinition: range of values in which there is a specified probability of finding the true
Term: distributionDefinition: characterized by a mean and standard deviation—mean is center of distribution and deviation is width (bell shaped curve)
Term: standard Definition: of width of distribution
Term: standard deviationDefinition: std deviation by mean
Term: standard deviationDefinition: pooled standard deviation to make use of multiple sets of
Term: testDefinition: test for an
Term: t statisticDefinition: ratio of the departure of an estimated from its notional value and its standard error
Term: p Definition: tells you if you can reject or accept your null
Term: F testDefinition: to test if from two things are equal
Term: t testDefinition: statistical tool used to confidence intervals and to compare results from different experiments
Term: varianceDefinition: square of the standard
Term: back Definition: of a standard reagent is added to analyte
Term: titrationDefinition: contains everything except the analyte helps us see titration
Term: end Definition: sudden change in physical property of
Term: equivalence Definition: when the of titrant moles of analyte in their stoichiometric relationship
Term: Definition: with a property that changes abruptly when titration is complete
Term: standardDefinition: pure enough to weigh and use directly for of moles
Term: standard Definition: solution containing quantity of analyte
Term: Definition: titrating to concentration of titrant
Term: titrantDefinition: known reagent
Term: Definition: increments of a known are added to the analyte
Term: titration Definition: difference endpoint and equivalence point
Term: volumetric Definition: of known reagent required for complete reaction with analyte by a known reaction is measured
Term: errorDefinition: dif btwn observed and true point
Term: standard acids and basesDefinition:
Term: Definition: bases
Term: Na2CO3 and Definition:
Term: Nitrogen determinationDefinition: one of the most used methods for determining
Term: nitrogen in organic Definition: the solid is digested in boiling sulfuric acid to nitrogen into ammonium
Term: ChelateDefinition: compound containing a (typically organic) bonded to a central metal atom at two or more points
Term: complexometric Definition: for of volumetric analysis in which the formation of a colored is used to indicate the endpoint of a titration
Term: titrationDefinition: way to determine the contents of a quantitatively
Term: displacement Definition: analyte is treated with excess of a second bound to EDTA. The analyte ion displaces the second metal from the EDTA complex
Term: titrationDefinition: another name for a back
Term: formation Definition: equilibrium constant for reaction of a with a ligand. Also called stability constant
Term: Lewis Definition: electron pair
Term: baseDefinition: electron pair
Term: LigandDefinition: atom or group of atoms to whatever atom you are interested in
Term: masking Definition: prevents impurities from reacting with the
Term: monodentate Definition: ligand that bonds to a metal through only one
Term: multidentate Definition: binds to the ligand through more than one ligand atom
Term: indicatorDefinition: used in Fajans
Term: argentometric Definition: titrations Ag+
Term: titrationDefinition: adsorption of a indicator on the precipitate at the end point
Term: Mohr Definition: determination of a chloride by precipitation titration with nitrate
Term: Vollhard Definition: formation of a
Term: Definition: when a reducing analyte is titrated wIth
Term: iodometryDefinition: titration Of iodine produced when oxidizing is added to excess I-
Term: Definition: most useful quantitity for chemical (A)—higher the absorbance
Term: absorbance Definition: graph showing how A (or epsilon) with wavelength
Term: Beer's Definition: dependence on and path length
Term: curveDefinition: absorbance at one wavelength is plotted against different in a series of standards
Term: Definition: cell has flate
Term: absorptivityDefinition: symbolized by
Term: Definition: the use of radiation to measure chemical concentrations
Term: Definition: the of incident light that passes through a sample TEquals(P/Po)
Term: Definition: - to- crest distance between waves
 
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