Question

cho các chất sau: CaO,Fe2O3, SO2,P2O5 . chất nào t/d với

a, h2o

b, dd hcl

c, dd ca(oh)2

viết ptpu

Answer 1

https://i.imgur.com/yjWZrIN.jpg

Answer 2

CaO+2H2O--->Ca(OH)2+H2O

SO2+H2O--->H2SO3

P2O5+3H2O--->2H3PO4

CaO+2HCl--->CaCl2+H2O

Fe2O3+6HCl--->2FeCl3+3H2O

SO2+Ca(OH)2--->CaSO3+H2O

P2O5+3Ca(OH)2--->Ca3(PO4)2+3H2O

Answer 3

a) H2O

CaO + H2O --> Ca(OH)2

SO2 + H2O --> H2SO3

P2O5 + 3H2O --> 2H3PO4

b) dd HCl

CaO + 2HCl --> CaCl2 + H2O

Fe2O3 + 6HCl --> 2FeCl3 + 3H2O

c) dd Ca(OH)2

Ca(OH)2 + SO2 --> CaSO3 + H2O

Ca(OH)2 + 2SO2 --> Ca(HSO3)2

3Ca(OH)2 + P2O5 --> Ca3(PO4)2 + 3H2O