mdd sau khi hòa tan= mNaCl + mH2O= 0.5*58.5+300*1=329.25g
C%NaCl= 29.25/329.25*100%= 8.88%
CM NaCl= 0.5/0.3=1.67M
mNaCl = 0,5.58,5 = 29,25 (g)
mdd sau pứ = 29,25 + 300 = 329,25 (g)
Đổi: 300ml = 300g = 0,3l
Vậy: C% NaCl = \(\frac{29,25}{329,25}.100\%=8,9\%\)
CM NaCl = \(\frac{0,5}{0,3}=1,67\left(M\right)\)