Question

佩紋

《普通化學》第九題跟第十題，感恩。

Alinie 2 PBurel H12 lapf Setul lagly x2
e determined by titfátinga
100
sample of
KCror.
Nos cag & beth 14 raqla 1: 191 +24100) No. (aq) + 2 Al Al EX Mn of laql4 2 1 7 Mn Oz (s) + Al(Orta
9. The blood alcohol (C2H5OH) level can be
potassium dichromate solution, resulting in the production of Cr3+ (aq) and carbon dioxide. The reaction can
of blood plasma with an acidic
be monitored because the dichromate ion. (Cr20,?) is orange in solution, and the Cr" ion is green. The
unbalanced redox equation is
C₂H5OH(aq) + 3H₃0 (aq) + 2 CO2 (g) +12Hg)
Me Cr2O,?- (aq) + CHșOH (aq) --Cr"(aq) + CO2(8) 14 Heag toe Cruon Lafla203149)
If 31.05 mL of 0,0600_M potassium dichromate solution is required to titrate 30.0 g of blood plasma, Hamm
Fapter
(aq)
determine the mass percent of alcohol in the blood. 0.143% Ca H5OH.
2-
tize
32.0 g
10. An average human being has about 5.0 L of blood in his or her body. If an average person were to eat
ht
of sugar (sucrose, C12H22011, 342.30 g/mol), and all that sugar were dissolved into the bloodstream,
how would the molarity of the blood sugar change?
HO
+1
HO
+1
H
&H
to H -
31
OH
HO
HIP
126
0
HO
+1
+
5e
OH
OH
OH
(+36 ) x2
t6
Cr2O7 - 20+
3+