Ca3(PO4)2+3H2SO4\(\rightarrow\)3CaSO4+2H3PO4
Ca3(PO4)2+4H3PO4\(\rightarrow\)3Ca(H2PO4)2
Ta có
392g H3PO4 tạo ra 702g Ca(H2PO4)2
xkg _____________468kg
x=\(\frac{\text{468.392}}{702}\)=261,33(kg)
294g H2SO4 tạo ra 196gH3PO4
y kg_____________261,333 kg
y=392(kg)
Mà H=80%
\(\rightarrow\)mH2SO4=\(\frac{392}{80\%}\)=490(kg)
mdd=\(\frac{490}{70\%}\)=700(kg)