Consider the following substance:
NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2
Which two substance combine to form bleaching powder?
Ca(OH)2 combines with Cl2 to give bleaching powder (CaOCl2 ).
The chemical reaction involved is as follows.
2Ca(OH)2 + CaCl2 → CaOCl2 + 2H2O