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If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Term: Definition: a compound containing a ligand (typically organic) to a central metal atom at two or more points. 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 the contents of a substance quantitatively. Term: titrationDefinition: Here the analyte is treated with an excess of a second metal bound to EDTA. The ion displaces the second metal from the EDTA complex Term: Lewis Definition: pair acceptors Term: Lewis Definition: electron pair Term: LigandDefinition: an atom or group of atoms bound to whatever atom you are interested Term: ligandDefinition: ligand that to a metal ion through only one atom Term: multidentate Definition: binds to the ligand through more than one ligand atom Term: AliquotDefinition: portion that represents a Term: factorDefinition: portion of solution Term: Definition: that is undergoing analysis (substance being measured) Term: analytical Definition: concentration when you weigh something and dissolve it→ the total number of moles Term: concentrationDefinition: the concentration Term: Definition: m/v Term: molarityDefinition: moles solute/ L Term: weightDefinition: molar mass ( mass of a molecule) calculated as the sum of the mass of each constituent atom multiplied by the number of atoms of that element in the formula Term: percentDefinition: solute/ mL sample Term: analysisDefinition: identifying what is in an Term: analysisDefinition: identifying how much is 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 titrate→ goes to 4 s.f. measures in Term: Definition: agent in dessicator Term: desiccatorDefinition: closed chamber drying agent—to keep samples dried Term: direct Definition: directly on balance Term: Definition: absorbs/ moisture from air Term: indirect Definition: weigh by difference—do not weigh onto Term: Definition: curvature of liquid caused by tension Term: Definition: used to transfer known of liquid- can go to 4 s.f. Term: tareDefinition: 0 a Term: top-loading Definition: measures to 2 places Term: flaskDefinition: calibrated to contain certain vol of liquid at 20 degrees celcius when bottom of meniscus in in the right Term: parallax Definition: error that occurs when your eye is not at the same as the meniscus Term: accuracyDefinition: between delivered and desired volume Term: determinate Definition: repeatable if made same way (correctable) Term: indeterminate Definition: (random error)- from Term: precisionDefinition: reproducibility of deliveries Term: degrees of Definition: where n is number of data Term: confidence Definition: range of values in which there is a specified of finding the true mean Term: Gaussian Definition: characterized by a mean and standard deviation—mean is center of and standard deviation is width→ (bell shaped curve) Term: student’s t Definition: statistical tool used to express confidence and to compare results from different experiments Term: Definition: most useful quantitity for chemical analysis (A)—higher the Term: absorbance spectrum Definition: graph showing how A (or epsilon) varies with 's law→ Term: calibration Definition: at one wavelength is plotted against different concentrations in a series of standards Term: Definition: cell which has Term: absorptivity→Definition: symbolized by Term: spectrophotometry→Definition: the use of electromagnetic radiation to measure chemical Term: transmittance Definition: the of incident light that passes through a sample T=(P/Po) Term: wavelength→→Definition: crest- to- distance between waves Term: Definition: portion that a whole Term: aliquot Definition: portion of solution Term: Definition: substance that is undergoing analysis (substance measured) Term: analytical Definition: concentration when you weigh and dissolve it Term: concentrationDefinition: the actual Term: Definition: m/v Term: Definition: moles / L solution Term: weightDefinition: 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: weight Definition: solute/ mL sample Term: qualitative Definition: identifying what is in an Term: analysisDefinition: identifying how much is Term: gravimetric Definition: mass of product is measured to determine how much unknown was Term: balanceDefinition: measure to 4 places Term: buretDefinition: used to Term: Definition: agent in dessicator Term: Definition: closed chamber containing drying agent—to keep dried Term: direct Definition: directly on balance Term: hygroscopicDefinition: absorbs/ moisture from air Term: weighingDefinition: weigh by difference—do not weigh onto Term: meniscusDefinition: 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 places Term: flaskDefinition: calibrated to contain vol of liquid at 20 degrees celcius when bottom of meniscus in in the right spot Term: errorDefinition: error that occurs when your eye is not at the same as the meniscus Term: Definition: between delivered and desired volume Term: determinate Definition: repeatable if made same way (correctable) Term: indeterminate Definition: (random )- from experiment Term: precisionDefinition: reproducibility of replicate Term: relative relative uncertainty?Definition: (Absolute /magnitude of measurement) Term: precision (rsd)Definition: measurement of how close measurements are to each Term: systematic Definition: error in or equipment Term: of freedomDefinition: (n-1) Term: confidence Definition: of values in which there is a specified probability of finding the true mean Term: distributionDefinition: characterized by a mean and standard deviation—mean is center of distribution and deviation is width (bell shaped curve) Term: devationDefinition: of width of distribution Term: relative deviationDefinition: std deviation by mean Term: pooled standard Definition: pooled standard deviation to make use of multiple sets of Term: Grubbs Definition: test for an Term: t statisticDefinition: of the departure of an estimated parameter from its notional value and its standard error Term: p Definition: tells you if you can or accept your null hypothesis Term: F testDefinition: to test if variances from two things are Term: student’s t Definition: statistical tool used to confidence intervals and to compare results from different experiments Term: Definition: of the standard deviation Term: back Definition: excess of a standard reagent is added to Term: titrationDefinition: contains everything except the analyte us see titration error Term: end Definition: sudden change in physical property of Term: pointDefinition: when the moles of titrant moles of analyte in their stoichiometric Term: indicatorDefinition: compound with a property that abruptly when titration is complete Term: standardDefinition: pure enough to weigh and use directly for number of Term: solutionDefinition: solution containing quantity of analyte Term: Definition: titrating to determine of titrant Term: titrantDefinition: known reagent Term: titrationDefinition: of a known reagent are added to the analyte Term: titration Definition: difference between and equivalence point Term: analysisDefinition: volume of known reagent required for complete reaction with analyte by a known reaction is Term: errorDefinition: dif btwn observed and true point Term: primary standard acids and Definition: Term: KHPDefinition: Term: and THAMDefinition: Term: Kjeldahl determinationDefinition: one of the most widely used for determining Term: in organic substancesDefinition: the solid is digested in sulfuric acid to convert nitrogen into ammonium Term: Definition: compound containing a ligand (typically ) bonded to a central metal atom at two or more points Term: complexometric Definition: for of analysis in which the formation of a colored complex is used to indicate the endpoint of a titration Term: titrationDefinition: way to determine the of a substance quantitatively Term: titrationDefinition: analyte is treated with of a second metal 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 metal with a . Also called stability constant Term: acidDefinition: electron pair Term: Lewis Definition: electron pair Term: Definition: atom or group of atoms bound to whatever atom you are interested Term: masking Definition: prevents impurities from with the precipitant Term: monodentate Definition: ligand that to a metal through only one atom Term: multidentate Definition: binds to the metal ligand through more than one atom Term: adsorption Definition: used in Fajans Term: argentometric Definition: titrations Ag+ Term: Fajans Definition: adsorption of a colored indicator on the precipitate at the end Term: Mohr Definition: determination of a chloride by precipitation titration with silver Term: Vollhard Definition: of a soluble Term: Definition: when a reducing is titrated wIth iodine Term: Definition: titration Of iodine when oxidizing analyte is added to excess I- Term: Spectroscopy
AbsorbanceDefinition: most useful quantitity for chemical (A)—higher the absorbance Term: absorbance Definition: graph showing how A (or ) varies with wavelength Term: Beer's Definition: dependence on concentration and path Term: calibration Definition: absorbance at one wavelength is against different concentrations in a series of standards Term: cuvetDefinition: cell which has Term: absorptivityDefinition: symbolized by Term: spectrophotometryDefinition: the use of electromagnetic radiation to measure concentrations Term: transmittanceDefinition: the of incident light that passes through a sample TEquals(P/Po) Term: Definition: crest- to- crest between waves |
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