ANALYTICAL CHEMISTRY TEST 1 QUESTIONS AND CORRECT ANSWERS

ANALYTICAL CHEMISTRY TEST 1
QUESTIONS AND CORRECT
ANSWERS
allquotA2-A2Ans--portion

analyteA2-A2Ans--substanceA2beingA2measuredA2orA2detected

calibrationA2curveA2-A2Ans--
aA2graphA2showingA2theA2valueA2ofA2someA2propertyA2versusA2concentrationA2ofA2analyte.
A2whenA2theA2correspondingA2propertyA2ofA2anA2unknownA2isA2measuredA2itsA2concentrati
onA2canA2beA2determineA2fromA2teA2graph

compositeA2sampleA2-A2Ans--
aA2representativeA2sampleA2preparedA2fromA2aA2heterogeneousA2material.A2ifA2theA2materi
alA2consistsA2ofA2distinctA2regions,A2theA2compositeA2isA2madeA2ofA2portionsA2ofA2eachA2re
gion,A2withA2relativeA2amountsA2proportionalA2toA2theA2sizeA2ofA2eachA2region

decantA2-A2Ans--toA2pourA2liquidA2offA2aA2solidA2orA2perhapsA2aA2denserA2liquid

interferenceA2-A2Ans--
aA2phenomenonA2inA2whichA2theA2presenceA2ofA2oneA2substanceA2changesA2theA2responc
eA2inA2theA2analysisA2ofA2anotherA2substance

maskingA2-A2Ans--
processA2ofA2addingA2aA2chemicalA2substanceA2toA2aA2sampleA2toA2preventA2oneA2orA2mor
eA2componentsA2fromA2interferingA2inA2aA2chemicalA2analysis

qualitativeA2analysisA2-A2Ans--
ProcessA2ofA2determiningA2theA2identityA2ofA2theA2constituentsA2ofA2aA2substance.

quantitativeA2analysisA2-A2Ans--
processA2ofA2measureingA2howA2muchA2ofA2aA2constituentA2isA2presentA2inA2aA2substance

randomA2heterogeneousA2materialA2-A2Ans--
AA2materialA2inA2whichA2thereA2areA2differencesA2inA2compositionA2withA2noA2patternA2or
predictabilityA2andA2onA2aA2fineA2scale.A2WhenA2youA2collectA2aA2portionA2ofA2theA2material
A2forA2analysis,A2youA2obtainA2someA2ofA2each
ofA2theA2differentA2compositions.

, quantitativeA2transferA2-A2Ans--
TransferA2ofA2theA2entireA2contentsA2fromA2oneA2vesselA2toA2another.A2ThisA2processA2isA2
usually
accomplishedA2byA2rinsingA2theA2firstA2vesselA2severalA2timesA2withA2freshA2liquidA2andA2p
ouringA2eachA2rinseA2intoA2theA2receiving
vessel.

randomA2sampleA2-A2Ans--
bulkA2sampleA2constructedA2byA2takingA2portionsA2ofA2theA2entireA2lotA2atA2random

sampleA2preparationA2-A2Ans--
TransformingA2aA2sampleA2intoA2aA2stateA2thatA2isA2suitableA2forA2analysis.A2ThisA2process
A2canA2include
concentratingA2aA2diluteA2analyteA2andA2removingA2orA2maskingA2interferingA2species.

samplingA2-A2Ans--theA2processA2ofA2collectingA2aA2representativeA2sampleA2forA2analysis

segregatedA2herogeneousA2materialA2-A2Ans--
aA2materialA2inA2whichA2differencesA2inA2compositionA2areA2onA2aA2largeA2scale.A2differentA
2regionsA2haveA2oviouslyA2differentA2composition


slurryA2-A2Ans--aA2suspensionA2ofA2aA2solidA2inA2aA2solvent

speciesA2-A2Ans--
chemistsA2referA2toA2anyA2element,A2compound,A2orA2ionA2ofA2interestA2asA2aA2species

standardA2solutionA2-A2Ans--
aA2solutionA2whoseA2compositionA2isA2knownA2byA2virtueA2ofA2theA2wayA2thatA2itA2wasA2ma
deA2fromA2aA2reagentA2ofA2knownA2purityA2orA2byA2virtueA2ofA2itsA2reactionA2withA2aA2known
A2quantityA2ofA2standardA2reagent


supernatantA2liquidA2-A2Ans--liquidA2remainingA2aboveA2theA2solicA2afterA2aA2precipitation

avogadrosA2numberA2-A2Ans--6.022A2xA210^23

partsA2perA2thousandA2-A2Ans--
gramsA2ofA2xA2dividedA2byA2oneA2gramA2ofA2solutionA2timesA2oneA2thousand

abscissaA2-A2Ans--horizontalA2xA2axisA2ofA2aA2graph

anhydrousA2-A2Ans--
adjectiveA2describingA2aA2substanceA2fromA2whichA2allA2waterA2hasA2beenA2removed

atomicA2massA2-A2Ans--
numberA2ofA2gramsA2ofA2anA2elementA2containingA2avogadrosA2numberA2ofA2atoms