Cm=cp*d/M*100%
Cm=23,12*1220/56*100=5,04mol/dm^3
5,04mol/dm^3----------------(1,5-0,984)=0,516cm^3
-------------1,5mol/dm^3-------------
0,984mol/dm^3---------------(5,04-1,5)=3,54cm^3
x cm^3 (roztw. 23,12%)----------------1000c^3 (roztw. 0,984M)
0,516cm^3 roztw. 23,12%-------------3,54cm^3 roztw. 0,984M
x=145,76cm^3 roztworu trzeba wziąć