:
, .
.
.
(..) .
.
.
.
, .
.
: (1/z X) ∙ V (X) = (1/z T) ∙ V (T)
1
20%- KOH (ρ = 1,3 /), 1,5 (KOH) = 0,1 /.
: ω(KOH) = 20% C(KOH) = 0,1 / V(KOH) = 1,5 ρ = 1,3 / | : 1. KOH ω = 20% V(-) = |
V(KOH, 20% -) =? | ρ , . |
2. ω = 20% KOH, :
ω =
m (-) = ω % , KOH .
3. KOH , KOH KOH.
m(KOH) = M(KOH) ∙ υ(KOH) M(KOH) = 56/.
4. KOH , KOH .
υ(KOH) = V(-) ∙ C(KOH)
C(KOH) .
1. KOH:
n(KOH) = 1,5 ∙ 0,1 / = 0,15
2. :
m(KOH) = 0,15 ∙ 40 / = 6
3. , 6 KOH:
m(-) = = 30
4.
V(-) = = 23
: 23 . 1,5 .
2
250 . 20 :
2NaOH + 2H2SO4 = Na2SO4 + 2H2O
24 C(1/2H2SO4) = 0,08 /.
NaOH, .
: V1(NaOH) = 200 = 0,20 . V2(NaOH) = 20 V(H2SO4) = 22 (1/2H2SO4) = 0,055 / | : 1. NaOH. (NaOH) ∙V(NaOH) = C(1/2H2SO4) ∙V(H2SO4) C(NaOH)= = 0,605 /. |
m (NaOH) =? |
2. NaOH :
m(NaOH) = C(NaOH) ∙V1(NaOH) ∙M(NaOH)
m(NaOH) = 0,605 /∙0,20 ∙40 / = 4,84
|
|
: 4,84 NaOH.
:
1. (X), . . (X), 20,0 (?), () = 0,1 /.
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2. (X), . . (X), (X) 15,0 12,0 (?), () = 0,07 /.
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3. (X), . . (X) 5,00 12,00 (?), (1/z T) = 0,01 /.
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4. (X), . . (X), (X) 10,00 (II) 20,00 0,05 /, 10,00 (?), (1/z T) = 0,05 /.
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5. 0,065 /, , 0,1 .
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6. 2,32 100 . 10 7,2 0,15 /. .
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