Odpowiedź:
Wyjaśnienie:
Dane: Szukane:
Cp=11,96% V kwasu=?
d=1,08kg/dm³
mr=200g
Cp azotanu=12,6%
Cp=ms*100%/mr
ms = Cp*mr/100%
ms = 12,6%*200g/100%
ms = 25,2g Ba(NO₃)₂
M Ba(NO₃)₂ = 261g/mol
M H₂SO₄ = 98g/mol
25,2g x g
Ba(NO₃)₂ + H₂SO₄ = BaSO₄↓ + 2HNO₃
261g 98g
98g kwasu...............261g azotanu
x g kwasu................25,2g azotanu
x = 9,46g kwasu
mr = ms*100%/Cp
mr = 9,46g*100%/11,96%
mr = 79,1g
V = m/d
d = 1,08kg/dm³= 1080g/dm³= 1080g/1000cm³= 1,08g/cm³
V = 79,1/1,08
V = 73,24 cm³ kwasu