1)Oblicz ile gramow KOH znajduje sie w 300cm^3 25 % roztworu,ktorego gestosc wynosi 1,1g/cm^3
2)Oblicz objetosc 9g pary wodnej (warunki normalne )
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Zad. 1
Cp = (ms/mr) * 100%
ms = Cp*mr / 100%
d=mr/V
mr = dV
mr = 300*1,1=330g
ms= 25*330/100 = 82,5g
Zad.2
n= m/M
n=9/18 = 0,5mol
W warunkach normalnych 1 mol ma objętość 22,4dm3
22,4dm3 - 1 mol
x - 0,5mola
x=11,2dm3
Zadanie pierwsze
Cp = (ms/mr) * 100%
ms = Cp*mr / 100%
d=mr/V
mr = dV
mr = 300*1,1=330g
ms= 25*330/100 = 82,5g
Zadsnie drugie
n= m/M
n=9/18 = 0,5mol
22,4dm3 - 1 mol
x - 0,5mola
x=11,2dm3