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Unformatted text preview: f Fe in 737g sample. U
.64 PPlan:Ct n 0.2336 agent haswin a 125g serving S egal blood alcohol limit (0.08 %
4.110
lan: onvert the
Solution:
mass to convert mass to moles and use Avogadro’s number to convert moles of Fe to moles of ions. oxidizing agent has an atom whose oxidation number decreases during the reaction.
2–
Plan: An
a) The
Solution:S in SO4 (i.e., H2SO4) has O.N. = +6, and in SO2, O.N. (s) = +4, so the S has been reduced
Solution: (and the I– oxidized), so the H2SO2+is an oxidizing agent.
+
a Fe( + has O.N. Fe 4 oxidation g,) O.N. s) = +4, the S the reaction.
)
aq) in SO
P) The S oxidizingi.e., Ts2SO2)H atom →= +6,(and + constant throughout; Hsoduringhas been reduced – to produce HF,
alan: An i SO42– ( )agent)has4 an (aqnumbers remain H2(number (decreases SO4 transfers a proton to F
n
2
b) Hhe oxidation whose
2
–
O.N.: 0 +1
+2
0 (and the ISolution: ssoitthe Has an4acid. oxidizing agent.
oxidized), o acts 2SO is an
2 b) Fe2+ ons
a The oxidation– (i.e., H2 iremain O.N. = throughout; H , O.N. (s) = +4, proton h F to produce HF,
has
b) The S in SO4 numbersSO4) = constant +6, and in SO22SO4 transfers a so the Sto as– been reduced
( o it the – oxidized), .68
sand actsIas an acid. 4so the H2SO4 ionsult xidizing agent. rules for assigning oxidation numbers.
Plan: C s an o Table 4.3 for the
Solution:
b) The oxidation numbers remain constant throughout; H2SO4 transfers a proton to F– to produce HF,
(O.N. for N) + 3(+1 for H) + 1(–2 for
O.N. for N = –1
4o it actsPlan: Consult Table a) NH2OH: rules for assigning oxidation numbers. O) = 0
.68
4.3 for the
s
as an acid.
21
21
2+
b) N2F4= 3.115092x 10 for3N) x 10–1 Fe F)ons per jar of sauce
:
(O.N. = .1 + 4( for i = 0
O.N. for N = +2
Solution:
+
( for for N) 4(+1 O)
O
a) NH2OH: Table c) NH4 :N) + 3(+1O.N.H) + 1(+oxidationH)0= +1
(O.N. for the rules for assigning–2 for for =numbers. O.N. for N = –1 .N. for N = –3
for
4.68
Plan: Consult
4.3
d) HNO2
( 1 for F) =
O...
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This note was uploaded on 12/06/2012 for the course CHEM 100 taught by Professor Mark during the Fall '06 term at Monterey Peninsula College.
 Fall '06
 Mark

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