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2010 -2011
5
=. 30
21 :A6A+
0
=)*H=$
=
.S.#pH 6
+ )?0
0
-LQ4:
A - 6,63 B - 6,83 C - 7 D - 7,63 E - 7,83
22 : :+9# &1mol 5 M*2 _0 -1mol :B3 *22 S.# `E *B3 -
265% .
)%:+9')>1C':
A - 1mol B - 0,65mol C - 0,35mol D - 0,33mol E - 0,065mol
23 : 36 '"* S
1
M*B_6HCOOH T#C
1
=5.10
-2
mol/L 36S
2
_6
MC
6
H
5
COOH .a9*-6pH :pH=2,5 .
" :
HCOOH
I
A 6 5 6 5
pK (C H COOH/C H COO ) 4,2
−
A
−
, M(C)=12g/mol , M(O)=16g/mol, M(H)=1g/mol
A - ])5M98M])(R+98]?"). B - RC
2
%$>$S
2
R-()C
1
%$>$S
1
. C - >500mL %$>S
1
MK$0)1mL ^H9>.
D - %$>S
2
QD3 > :
6 5 6 5
−
E -
A A 6 5 6 5
K (HCOOH/HCOO ) K (C H COOH/C H COO )
24 : )'R,: %:
A - L5M B - L5# C - ])(++98 D - ])5+B)B5 E - LM5#
25 : )':+9'"GSb''2c:
←
:
A - D"$1BR#3$ B - I_B+L"`6SUI? C -
9>0#3$AH L D - %D6S R
O-
CH
3
C
O
CH
3
-CH
2
-CH
2