Do 300g 10% roztworu chlorku potasu dodano
A-10 g soli
B-50cm³ wody
C-100g 5% roztworu chlorku
Oblicz stężenia procentowe roztworów.


Odpowiedź :

A. Dane:

mr1=300 g

Cp1=10%

mr2=300 g+10 g=310 g

Szukane:

ms1=?

ms2=?

Cp2=?

ms1=Cp1*mr1/100%

ms2=ms1+10 g

Cp2=ms2*100%/mr2

Obliczenia:

ms1=10%*300g/100%

ms1=30 g

ms2=30 g+10g

ms2=40 g

Cp2=40g*100%/310 g

Cp2=12,9%

B. Dane:

mr1=300 g

Cp1=10%

mr2=300 g+50 g=350 g

Szukane:

ms=?

Cp2=?

ms=Cp1*mr1/100%

Cp2=ms*100%/mr2

Obliczenia:

ms=10%*300g/100%

ms=30 g

Cp2=30g*100%/350g

Cp2=8,57%

C. Dane:

mr1=300 g

Cp1=10%

mr2=100 g

Cp2=5%

mr3=300 g+100 g=400 g

Szukane:

ms1=?

ms2=?

ms3=?

Cp3=?

ms1=Cp1*mr1/100%

ms2=Cp2*mr2/100%

ms3=ms1+ms2

Cp3=ms3*100%/mr3

Obliczenia:

ms1=10%*300g/100%

ms1=30 g

ms2=5%*100g/100%

ms2=5 g

ms3=30 g+5 g

ms3=35 g

Cp3=35g*100%/400g

Cp3=8,75%