BIOCHEM MODULE 2 EXAM Q AND A

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BIOCHEM MODULE 2 EXAM Q AND A

ThenipHniofnianisolutionniofni0.0010niMniNaOHniis:

1ni
11ni
8ni
0ni
14ni-nianswer--11ni[Kw=[H+ni][OH-ni]ni=ni1.0nixni10-14;ni[H+ni][0.0010]ni=ni1.0nixni10-14ni[H+ni]=1.0nixni10-11;nipH=-
log[1.0nixni10-11;]=11]

Waterniisnianiuniquenimolecule.niWhichniofnithenifollowingnicontributesnitoniwater'sniuniqueniplaceniinnithenichemicalniw
orld?ni

-niThenigeometryniofnithenimoleculeni
-niThenipolarityniofnitheniO-Hnibondsni
-niTheniabilityniofniwaternimoleculesnitonihydrogennibondni
-niThenibondniangleniofniwaterni
-niAllniofnithenianswersniarenicorrectni-nianswer---niAllniofnithenianswersniarenicorrect

Thenibentnishapeniofniwaterniisniduenitoni______________.ni

-niThenidipoleniarrowsniinnianiwaternimoleculeni-ni-
niThenielectronegativity nidifferencenibetweennihydrogenniandnioxygenni

-niTheniunequalnielectronnisharingnibetweennihydrogenniandnioxygenni
-niTheniunsharednielectronnipairsnionnithenioxygenniatomni
-niNoneniofnithenianswersniarenicorrectni-nianswer---niTheniunsharednielectronnipairsnionnithenioxygenniatom

TheniH+niconcentrationniofnianisolutionniisni1.2nixni10-3niM.niWhatniisnithenipH?ni

-1.20ni
1.20ni
3.12ni
-2.92ni
2.92ni-nianswer--2.92

IfnitheniKaniofnianniacidniisni5.63nixni10-3,niwhatniisnithenipKa?ni

6.86ni
2.25ni
5.63ni
10.12ni
1.38ni-nianswer--2.25ni[pKani=ni-log(5.63nixni10-3)ni=ni2.25]

ListnitheniacidsniinniDECREASINGniorderniofnistrengthni(strongestnitoniweakest):ni
Nitrousniacidni(Kani=ni4.0nixni10-4);ni
aceticniacidni(Kani=ni1.7nixni10-5);ni
phosphoricniacidni(Kani=ni7.3nixni10-3)ni

-niNitrousniacid,niaceticniacid,niphosphoricniacidni
-niAceticniacid,ninitrousniacid,niphosphoricniacidni
-niPhosphoricniacid,ninitrousniacid,niaceticniacidni-niAceticniacid,niphosphoricniacid,ninitrousniacidni
-niNoneniofnitheniaboveni-nianswer---niPhosphoricniacid,ninitrousniacid,niaceticniacid

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