Cân bằng các pthh sau: Ca(OH)2 + HBr -> CaBr2 + H2O Ca(OH) + HCl -> CaCl2 + H2O Ca(OH)2 + H2SO4 -> CaSO4 + H2O Ca(OH)2 + Na2CO3 -> CaCO3 + NaOH

1,

$Ca(OH)_2 + 2HBr$ $\rightarrow$ $CaBr_2 + 2H_2O$

2,

$Ca(OH)_2 + 2HCl$ $\rightarrow$ $CaCl_2 + 2H_2O$

3,

$Ca(OH)_2 + H_2SO_4$ $\rightarrow$ $CaSO_4 + 2H_2O$

4,

$Ca(OH)_2 + Na_2CO_3$ $\rightarrow$ $CaCO_3 + 2NaOH$