Zad.1xg 10%...........................35 - 25 = 10........................25%.............................+yg 35%...........................25 - 10 = 15..........................................................=..........................................................25650g roztworu---------25 częścixg roztworu------------10 części x = 260g 10% roztworu650g roztworu---------25 częściyg roztworu------------15 części y = 390g 35% roztworuZad.2M Ca(OH)2=74g/mol74g Ca(OH)2------1mol1,5g Ca(OH)2--------xmolix = 0,02molan=0,02molv=0,25dm3Cm=n/vCm=0,02/0,25Cm= 0,08mol/dm3Cm=0,08mol/dm3M=74g/mold=1,15g/cm3=1150g/dm3Cp=Cm*100%*M/dCp=0,08*100*74/1150Cp = 0,51%
zad.1
w załączniku
zad.2
M(Ca(OH)₂)=40g/mol+2*16g/mol+2*1g/mol=74g/mol
Vr=250cm³=0,25dm³
m=1,5g
d=1,15g/cm³
d=mr/Vr /*Vr
mr=d*Vr
mr=1,15g/cm³*250cm³
mr=287,5g
Cp=ms/mr * 100%
Cp=1,5g/287,5 * 100%
Cp=0,5%
n=m/M
n=1,5g / 74g/mol
n=0,02mol
Cm=n/Vr
Cm=0,02mol/0,25dm³
Cm=0,08mol/dm³
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Zad.1
xg 10%...........................35 - 25 = 10
........................25%.............................+
yg 35%...........................25 - 10 = 15
..........................................................=
..........................................................25
650g roztworu---------25 części
xg roztworu------------10 części
x = 260g 10% roztworu
650g roztworu---------25 części
yg roztworu------------15 części
y = 390g 35% roztworu
Zad.2
M Ca(OH)2=74g/mol
74g Ca(OH)2------1mol
1,5g Ca(OH)2--------xmoli
x = 0,02mola
n=0,02mol
v=0,25dm3
Cm=n/v
Cm=0,02/0,25
Cm= 0,08mol/dm3
Cm=0,08mol/dm3
M=74g/mol
d=1,15g/cm3=1150g/dm3
Cp=Cm*100%*M/d
Cp=0,08*100*74/1150
Cp = 0,51%
zad.1
w załączniku
zad.2
M(Ca(OH)₂)=40g/mol+2*16g/mol+2*1g/mol=74g/mol
Vr=250cm³=0,25dm³
m=1,5g
d=1,15g/cm³
d=mr/Vr /*Vr
mr=d*Vr
mr=1,15g/cm³*250cm³
mr=287,5g
Cp=ms/mr * 100%
Cp=1,5g/287,5 * 100%
Cp=0,5%
n=m/M
n=1,5g / 74g/mol
n=0,02mol
Cm=n/Vr
Cm=0,02mol/0,25dm³
Cm=0,08mol/dm³