H3PO4 - ортофосфорная кислота, трехосновная кислота средней силы.
2)Na2So4+2HNo3=2NaNo3+H2So4
3)Na2So4+2KCl=2NaCl+K2So4
4)H2So4+2KNo3=K2So4+2HNo3
1) H2So4+K2C03=K2So4+H2o+Co2
<span><span>C2H5OH</span> = <span>C2H4</span> + <span>H2<span>O
</span></span></span><span>C2H4 + H2 = C2H6
</span><span>C2H6+Cl2 = HCl+C2H5Cl
</span>
C2H5Cl + KOH = C2H4 + KCl + H2O
<span><span>C2H4</span> + <span>Br2</span> = C2H4Br<span>2</span></span>