ANALYTICAL CHEMISTRY EXAM 1 QUESTIONS AND CORRECT ANSWERS

ANALYTICAL CHEMISTRY EXAM 1
QUESTIONS AND CORRECT
ANSWERS
(DetermineA2ifA2itA2isA2aA2quantitativeA2orA2qualitativeA2analysis)A2AA2scientistA2analyzesA2
aA2sampleA2ofA2groundA2waterA2toA2determineA2whichA2heavyA2metalsA2haveA2contaminat
edA2theA2sourceA2-A2Ans--Qualitative

(DetermineA2ifA2itA2isA2aA2quantitativeA2orA2qualitativeA2analysis)A2AA2scientistA2analyzesA2
aA2sampleA2ofA2groundA2waterA2toA2determineA2theA2amountA2ofA2leadA2presentA2-A2Ans--
Quantitative

(DetermineA2ifA2itA2isA2aA2quantitativeA2orA2qualitativeA2analysis)A2AA2pharmaceuticalA2tech
nicianA2analyzesA2theA2productA2ofA2anA2experimentA2toA2seeA2howA2muchA2activeA2ingred
ientA2inA2aA2newA2medicationA2wasA2producedA2-A2Ans--Quantitative

(DetermineA2ifA2itA2isA2aA2quantitativeA2orA2qualitativeA2analysis)A2AA2pharmaceuticalA2tech
nicianA2analyzesA2theA2productA2ofA2anA2experimentA2toA2seeA2ifA2anyA2sideA2reactionsA2h
aveA2occurred.A2-A2Ans--Qualitative

aA2portionA2ofA2aA2sampleA2-A2Ans--aliquot

aA2solutionA2whoseA2compositionA2isA2accuratelyA2knownA2-A2Ans--Standard

theA2substanceA2beingA2measuredA2-A2Ans--analyte

aA2liquidA2remainingA2aboveA2aA2solidA2afterA2precipitationA2-A2Ans--supernatant

aA2suspensionA2ofA2aA2solidA2inA2aA2solventA2-A2Ans--slurry

inA2waterA2-A2Ans--aqueous

WhatA2areA2theA2sixA2stepsA2ofA2theA2analyticalA2process?A2-A2Ans--
1.A2FormulateA2aA2questionA2
2.A2SelectA2anA2analyticalA2procedureA2
3.A2ObtainA2representativeA2sampleA2
4.A2SampleA2preparation
5.A2ChemicalA2analysisA2
6.A2ResultA2interpretationA2andA2drawA2conclusions

theA2substanceA2inA2interestA2inA2aA2chemicalA2analysisA2-A2Ans--analyte

aA2portionA2ofA2sampleA2usedA2forA2analysisA2-A2Ans--sample

, allA2substancesA2foundA2withinA2aA2materialA2-A2Ans--Matrix

(IdentifyA2theA2sampleA2andA2analyteA2inA2eachA2scenario)A2DeterminationA2ofA2leadA2cont
entA2inA2paintA2-A2Ans--Sample:A2Paint
Analyte:Lead

(IdentifyA2theA2sampleA2andA2analyteA2inA2eachA2scenario)A2AnalysisA2ofA2theA2nitrateA2co
ntentA2ofA2soilA2nearA2aA2localA2waterA2sourceA2-A2Ans--Sample:A2SoilA2
Analyte:A2Nitrate

(IdentifyA2theA2sampleA2andA2analyteA2inA2eachA2scenario)A2MeasurementA2ofA2citricA2acid
A2foundA2inA2aA2limeA2-A2Ans--Sample:A2LimeA2wedgeA2
Analyte:A2CitricA2acid

(IdentifyA2asA2eitherA2aA2hypothesis,A2law,A2orA2theory)A2AnA2untestedA2explanationA2-
A2Ans--Hypothesis


(IdentifyA2asA2eitherA2aA2hypothesis,A2law,A2orA2theory)A2AA2botanistA2guesses,A2butA2hasA2
notA2verified,A2whyA2plantsA2withA2oneA2red-floweredA2andA2oneA2white-
floweredA2parentA2haveA2pinkA2flowersA2-A2Ans--Hypothesis

(IdentifyA2asA2eitherA2aA2hypothesis,A2law,A2orA2theory)A2AnA2explanationA2thatA2hasA2been
A2testedA2andA2verifiedA2-A2Ans--Theory


(IdentifyA2asA2eitherA2aA2hypothesis,A2law,A2orA2theory)A2Scientist,A2afterA2manyA2experime
ntsA2explainA2conservationA2ofA2massA2byA2statingA2thatA2matterA2isA2composedA2ofA2atom
sA2-A2Ans--Theory

(IdentifyA2asA2eitherA2aA2hypothesis,A2law,A2orA2theory)A2AA2descriptionA2thatA2predictsA2w
hatA2happens,A2butA2doesA2notA2explainA2how.A2-A2Ans--Law

AA2generalizationA2thatA2conciselyA2summarizesA2informationA2aboutA2naturalA2phenome
naA2-A2Ans--Law

aA2tentativeA2modelA2orA2pictureA2thatA2offersA2anA2explanationA2forA2theA2behaviorA2ofA2aA
2reactionA2-A2Ans--Hypothesis


aA2tentativeA2modelA2thatA2hasA2beenA2testedA2andA2validatedA2overA2longA2periodsA2ofA2ti
meA2-A2Ans--Theory

AA2validA2observationA2aboutA2someA2naturalA2phenomenonA2-A2Ans--Fact

nanoA2-A2Ans--10^-9

centiA2-A2Ans--10^-2