1)
md=100g MnSO4
mH2O=400g
c=?
-------------------------------------------
msol = md + mH2O = 100+400 = 500g
[tex]c=\frac{md*100}{ms}=\frac{100*100}{500}=20[/tex]%
2)
md=50g MnSO4
mH2O = 950g
c=?
-----------------------------------
msol = md + mH2O = 50+950 = 1000g
[tex]c=\frac{md*100}{ms}=\frac{50*100}{1000}=5[/tex]%