(1)SiO2的质量=60t×90%=54 t
(2)解:设制得硅酸钠的质量为x.
2NaOH+SiO2═Na2SiO3+H2O
60 122
54 t x
=60 54t
122 x
x=109.8 t
答:(1)60t石英砂中含二氧化硅的质量是54t.
(2)制得硅酸钠的质量为109.8t.