Question

Do 400g 2% wody morskiej dosypano 22g soli. Oblicz stężenie % nowo powstałego roztworu.

Answer 1

I
mr=4oog
cp=2%
ms=2%*400g=8g
II
ms=8g+22g=30g
mr=400g+22g=422g
cp=30g*100%/422g=7,109%

Answer 2

Mr=422g
cp=2%=0.02
ms=22g+(o.o2*400g)=22g+8g=30g

Cp=ms*100%/mr
Cp=30g*100%/422g
Cp=7.109%