HCl + NaOH=H2O + NaCl
36.5 40 18 58.5
10g*7.3%=0.73g x y z
(1)36.5/0.73g=40/x
x=0.8g
答:原固体混合物中氢氧化钠的质量为0.8g.
(2)36.5/0.73g=18/y
y=0.36g
36.5/0.73g=58.5/z
z=1.17g
(1g-0.8g+1.17g)/(1g-0.8g-1.17g+9g+0.36g+10g-0.73g)*100%
=1.37g/20g*100%
=0.0685g*100%
=6.85%
答:反应后所得溶液中溶质质量分数为6.85%