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Chemistry 103 Lab Exam ReviewExperiment A: ATOMS AND LNE
S!ECTRA
Experiment ": STOC#OMETR$ AND REACTONS NA%&EO&S
SOL&TONS
A'(min(m is the m)st ab(n*ant meta' in the earth+s ,r(st an* the
thir* m)st
ab(n*ant e'ement-
.A/SO212#2O is ,a''e* a'(m )r p)tassi(m a'(min(m s('4ate
*)*e,ahy*rate
5irst the s,raps )4 a'(min(m 4r)m p)p ,ans wi'' be *iss)'ve* by
rea,ti)n with
h)t p)tassi(m hy*r)xi*e- A,,)r*in6 t)
A'/s7.O#a87#2O9.77A'/O#/a87#2O
Se,)n* s('4(ri, a,i* is a**e*- nitia''y a white s)'i* A'/O#3
4)rms a,,)r*in6 t)
A'/O#/a87#2SO 9A'/O#37#2O7SO
#)wever; the A'/O#3then (n*er6)es 4(rther rea,ti)n a,,)r*in6 t)
thee8(ati)n:A'/O#37 #2SO9A'377SO27#2O/'Al(OH)3is amphoteric
The 'abe' )4 4erti'i#2O
Experiment C: COM!O&NDS O5 CO!!ER Nitri, a,i* /#NO3 is a
str)n6 oxidizing agent
n the tra*iti)na' ,)pper ,y,'e experiment; ,)pper is trans4)rme*
t) ,)pper/
s('4ate by the 4)'')win6 steps:C(9C(/NO329C(CO39C(SO
C(7N#37#2O9C(/NO327NO/67#2O/'
NO/67O29NO2!)is)n)(s Re**ish "r)wn @as
C(/NO327Na2CO39C(CO37Na2/NO3
C(CO3 7#2SO9C(SO?#2O Carbon dioxide also gien o!
n water N#3a,ts as a wea base an* pr)*(,es O#- A**iti)n )4
sma''
am)(nts )4 a8(e)(s amm)nia t) the ,)pper s('4ate s)'(ti)n 'ea*s
t) the
4)rmati)n )4 the light bl"e C(/O#2- #)wever when 'ar6e am)(nts
)4
a8(e)(s amm)nia are a**e*; the amm)nia b)n*s t) C(27in
s)'(ti)n
pr)*(,in6 the dar# bl"e complex ion C(/N#3- Tetraammine,)pper
/
s('4ate m)n)hy*rate is very s)'(b'e in water b(t n)t in ethy'
a',)h)'-
5ina''y ,)pper meta' wi'' be re,)vere* by a**in6 Bn t) C(SO; the
4)'')win6
rea,ti)n ),,(rs:Bn7C(SO9BnSO7C(/s
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$)(r initia' mass is e8(iva'ent t) a mass )4 ,)pper-
Experiment 5: ANAL$SS O5 TAMN C N TA"LETS AND N
TAN@ As,)rbi, a,i* )r vitamin C /C>#O> prevents
s,(rvy-
$itamin C is %ater sol"ble d"e to &ormation o& h'drogen
bonds.
)*ate titrati)n with vitamin ,
o The i)*ate ani)n rea,ts with an* #7t) 4)rm 2a,,)r*in6 t)
O37?7>#793273#2ON)te that ea,h O that is a**e* 4)rms three
2-
On,e 4)rme* 2is re*(,e* imme*iate'y by vitamin C ba, t) -
Ea,h O3that is a**e* res('ts in the rea,ti)n )4 three vitamin ,
m)'e,('es-
n )(r titrati)n with NaO#; vitamin C rea,ts in a 1:1 m)'e rati)-
N)te that
a'th)(6h vitamin C ,)ntains 4)(r O# 6r)(ps )n'y )ne )4 these
wi'' rea,t with
hy*r)xi*e at the ,)n*iti)ns )4 )(r experiment-
Titrati)n with NaO# *etermines t)ta' a,i*i, pr)t)ns- Titrati)n
with i)*ate
*etermines )n'y a,i*i, pr)t)ns *(e t) vitamin ,-
Experiment : "ONDN@ AND C#EMCAL !RO!ERTES The stren6th )4 the
a,i* is ae,te* by
o The abi'ity )4 R t) *raw e'e,tr)ns 4)rm the O#
o The stabi'ity )4 the ani)n- As the ani)n be,)mes m)re stab'e;
the
p)siti)n )4 the e8(i'ibri(m wi'' 'ie 4(rther t) the ri6ht; s)
the a,i* w)('*
be str)n6er-S(bstit(ents R ,)ntainin6 e'e,tr)ne6ative at)ms s(,h
as CL )r "r
res('t in *e'),a'i
