Odpowiedź:
Wyjaśnienie:
Dane: Szukane:
Cp₁ = 20% Cm=?
masa dodanego KOH = 2g
d=860g/dm³
M KOH = 56g/mol
ms = Cp₁*mr/100%
mr = d*V
mr = 860g/dm³*1dm³ = 860g
ms = 20%*860g/100%
ms = 172g KOH
mr=860g
ms = 172g + 2g = 174g
Cp₂ = 174*100%/860g
Cp₂ = 20,23%
Cm = Cp*d/M*100%
Cm = 20,23%*860g*dm⁻³/ 56g*mol⁻¹*100%
Cm = 3,12mol/dm³