1. 0,800 1,20 BaCl2 192 . .
. ) (w), , , 100 .
= 0,2 20%,
m l2;
mp , (mp = Vρ = 8001,2 = 960 );
V , (0,8 = 800 );
ρ , .
) 1 . l2 1
800 192 l2
1000 x l2
= 240 BaCl2
l2 ((l2) = 137 + (35,52)) = 208 , , l2, 1 ,
= 1,15 .
= 1,15 .
2. (1) KOH ω1 = 34,9% (ρ1 = 1,34 ) (2) V2 = 250 ω2 = 11,0% (ρ2 = 1,1 ). 2, ?
. , : 1) , ; 2) , . .
m ;
.
, m = V2ρ2ω2,
= 0,539 .
= 2,16
( ).
,
= 64,7 .
103. (ρ = 1,148 ) NaCl 20%.
104. (ρ = 1,100 ) l 20,01% 1 (ρ = 1,050 ) 10,17%?
105. 10 (ρ = 1,056 ) HNO3 10% 100 (ρ = 1,184 ) (%) HNO3 .
106-110. m V. ρ. ( %), , , .
A | m, | V, | ρ, | |
H2SO4 | 1,0 | 1,44 | ||
3O4 | 2,5 | 1,15 | ||
KOH | 2,0 | 1,27 | ||
HNO3 | 3,0 | 1,21 | ||
l | 0,5 | 1,10 |
111-115. A ω1, ( ρ1) V2 ω2 ( ρ2)? ?
ω1, % | ρ1, | V2, | ω2, % | ρ2, | ||
HNO3 | 27,0 | 1,160 | 1,00 | 20,0 | 1,115 | |
Na2CO3 | 15,2 | 1,160 | 2,50 | 4,50 | 1,045 | |
NH3 | 26,0 | 0,904 | 2,00 | 5,25 | 0,976 | |
NaOH | 40,0 | 1,430 | 5,00 | 10,00 | 1,110 | |
H2S04 | 95,1 | 1,834 | 10,00 | 4,00 | 1,025 |
|
|
116-120. Vl c1 . ρ2. c2 ω2?
V1, | c1, | , | ρ2, | ||
304 | 10,0 | 2,00 | 50,0 | 1,015 | |
HCI | 25,0 | 11,00 | 100,0 | 1,035 | |
2S04 | 5,0 | 6,40 | 50,0 | 1,035 | |
KOH | 50,0 | 9,95 | 1,020 | ||
HCIO4 | 20,0 | 3,45 | 100,0 | 1,030 |
.