44/ $ZnSO_4 + BaCl_2→ZnCl_2+BaSO_4$

45/ $CaSO_4+PbCl_2→CaCl_2+PbSO_4$

46/ $3Ca(OH)_2+2FeCl_3→3cacl_2+2Fe(OH)_3$

47/ $2AgNO_3+CaCl_2→2AgCl+Ca(NO_3)_2$

48/ $2AgOH→Ag_2O+H_2O$

49/ $2Fe+3Cl_2→2FeCl_3$

50/ $FeCl_3+3NaOH→Fe(OH)_3+3NaCl$

51/ $Fe(OH)_3+3H_2SO_4→Fe_2(SO_4)_3+3H_2O$

52/ $Fe_2(SO_4)_3+3BaCl_2→3BaSO_4+2FeCl_3$

53/ $Fe(NO_3)_3+3NaOH → Fe(OH)_3+3NaNO_3$

54/ $2Fe(OH)_3→Fe_2O_3+3H_2O$

Đáp án:

Giải thích các bước giải:

 44, $\text{$ZnSO_{4}$+ $PbCl_{2}$ $\longrightarrow$ $ZnCl_{2}$+ $PbSO_{4}$ $\downarrow$}$

 45, $CaSO_{4}$ + $PbCl_{2}$ $\longrightarrow$ $CaCl_{2}$+ $PbSO_{4}$

 46, 3$Ca(OH)_{2}$ + 2$FeCl_{3}$ $\longrightarrow$ 3$CaCl_{2}$ + 2$Fe(OH)_{3}$ $\downarrow$

 47, 2$AgNO_{3}$ + 1$CaCl_{2}$ $\longrightarrow$ 2$AgCl$ $\downarrow$ + $Ca(NO3)_{2}$

 48, $2AgOH$ $\longrightarrow$ $Ag_{2}$O + $H_{2}$O

 49, $2Fe$ + $3Cl_{2}$ $\longrightarrow$ $2FeCl_{3}$

 50, $FeCl_{3}$ + $3NaOH$ $\longrightarrow$ Fe($OH_{3}$)$\downarrow$ + $3NaCl$

 51, 2Fe($OH_{3}$) + $3H_{2}$$SO_{4}$ $\longrightarrow$ $Fe_{2}$$(SO4)_{3}$ + $6H_{2}$O

 52, $Fe_{2}$$(SO4)_{3}$ + 3$BaCl_{2}$ $\longrightarrow$ 3$Ba_{}$$SO_{4}$ + 2$FeCl_{2}$