Identify the bleaching powder from the given set of samples and understand the chemistry behind the bleaching action.
Bleaching powder is a light yellowish powder with a strong chlorine odour. Although it is soluble in water, the presence of contaminants prevents us from seeing a clean solution. Calcium hypochlorite or Calcium oxochloride has the chemical formula Ca(OCl2) and the chemical name Calcium hypochlorite or Calcium oxochloride.
Bleaching powder is a water-soluble bleaching agent used in the textile industry. In several sectors, it's also utilised as an oxidizer and disinfectant. It's also worth noting that bleaching powder is made by reacting chlorine gas with dry slaked lime (Ca(OH)2).
Bleaching powder is calcium oxochloride (CaOCl2). On treatment with small quantity of dilute acid, it liberates hypochlorous acid which can easily furnish oxygen called nascent oxygen and thus acts as an oxidising and bleaching agent.
2CaOCl2 (s) + H
HClO → HCl + [O] (Nasent oxygen)
In this experiment, we shall make use of this bleaching reaction to identify the bleaching powder from the given samples of chemicals.