(1)CO2:165.0-160.6=4.4g
(2)M(NaHCO3)=8.4g
M(NaCl)=1.6g
(3)M(生成)(NaCl)=5.85g
M总(NaCl)=7.45g
M液=68g+10g-4.4g=73.6g
w=7.95%