Write the balanced equation for the following chemical reactions.
A. Hydrogen + Chlorine ——> Hydrogen chloride
B. Barium chloride + Aluminium sulphate —–> Barium sulphate + Aluminium chloride
C. Sodium + water ——> Sodium hydroxide + Hydrogen
A. H2(g) + Cl2(g) ——-> 2HCl(l)
B. 3BaCl2(aq) + Al2(SO4)3(aq) ——-> 3BaSO4(s) + 2AlCl3(s)
Double displacement reaction
Balance Oxygen atom < Chlorine atom < rest elements
Aluminium sulphate reacts with various elements commonly found in impure water. These products are insoluble in water and settle down at bottom. This property is used for cleaning impure water.
C. 2Na(s) + H2O(l) ———-> 2NaOH(aq)
Sodium is a highly reactive metal and reacts promptly with water to form its hydroxide. The process is spontaneous and exothermic accompanied by sound.
During lab experiments sometimes it goes into the sink. And when tap water runs through it causes crackling sound and may also cause damage to sink pipe.