do 200g 10% roztworu soli dodano 20g soli. oblicz steżenie procentowe otrzymanego roztworu

ms= 10*200/100=20g ms=20+20=40 cp=40*100/220=18,1%

mr=200g cp=10% ms1=20g cp1=? cp=ms*100%/mr ms=cp*mr/100%=10%*200g/100%=20g ms1=ms+ms1=20g+20g=40g mr1=mr+ms=200g+20g=220g cp1=ms1*100%/mr1=40g*100%/220g=18,2%