#1. Hidroxido de calcio + acido sulfhidrico - - - > sulfuro de calcio + agua
Ca(OH)_{2} + <img src="https://tex.z-dn.net/?f=H_%7B2%7DS" /> - - - - > CaS + <img src="https://tex.z-dn.net/?f=H_%7B2%7DO" />
#2.
Hidroxido de cobre(II) + acido sulfuroso - - - > Sulfato de cobre(II) + agua <img src="https://tex.z-dn.net/?f=Cu%28OH%29_%7B2%7D" /> + <img src="https://tex.z-dn.net/?f=H_%7B2%7DSO_%7B4%7D" /> - - - ><img src="https://tex.z-dn.net/?f=CuSO_%7B4%7D" /> + <img src="https://tex.z-dn.net/?f=H_%7B2%7DO" />
#3.
Hidroxido ferroso + Acido cloroso - - - - > Clorito ferroso + agua <img src="https://tex.z-dn.net/?f=Fe%28OH%29_%7B2%7D" /> + <img src="https://tex.z-dn.net/?f=HClO_%7B2%7D" /> - - - ><img src="https://tex.z-dn.net/?f=Fe%28ClO_%7B2%7D%29_%7B2%7D" /> + <img src="https://tex.z-dn.net/?f=H_%7B2%7DO" />
#4.
Hidroxido de hierro(III) + Acido carbonico - - - > Carbonato de hierro(III) + Agua [img = 10] + [img = 11] - - - - >[img = 12] + [img = 13]
Espero haberte ayudado.
: ).