H2So4+CaCO7= H2S+Cu= H2S+Zn= H2S+MgO= H2S+KOH= H2S+Cu(OH)2= H2S+Ba(NO)3= H2S+CaCO7=

Question

H2So4+CaCO7=

H2S+Cu=

H2S+Zn=

H2S+MgO=

H2S+KOH=

H2S+Cu(OH)2=

H2S+Ba(NO)3=

H2S+CaCO7=

Answer 1

1)H2SO4+CaCO3=CaSO4+H2O+CO2

2)H2S+Cu=не идет

3)H2S+Zn=ZnS+H2

4)H2S+MgO=MgS+H2O

5)H2S+2KOH=K2S+2H2O

6) H2S+Cu(OH)2=CuS+2H2O

7)H2S+Ba(NO3)2=не идет

8) H2S+CaCO3=CaS+H2O+CO2