Mention one suitable laboratory procedure for

(i) removing carbon (IV) oxide from a sample of air

(ii) determining whether a given sample of water is pure or not;

(iii) concentrating a dilute solution of sodium chloride.

 

(b) Use the information provided in the table below to outline a suitable procedure for separating a mixture containing P, Q and R into its Components.

Component	Solubility in tetrachloromethane	Solubility in water
P Q R	Insoluble  Soluble Insoluble	Insoluble  Slightly soluble  soluble

 

(c)(i) Draw a labelled sketch to illustrate the collection of gases by upward displacement of air.

(ii) A gas S, with a rotten egg smell, was evolved when dilute hydrochloric acid was added to T which is a salt of iron (II). S decolorized acidified potassium tetraoxomanganate (VIl) solution and a yellow precipitate V was also obtained. Identify S, T and V.

(iii) State what would be observed on bubbling chlorine through a solution of potassium bromide.