C is a mixture of two salts. Carry out the following exercises on C. Record your observations and identify any gas(es) evolved. State the conclusion you draw from the result of each test.
(a) Put C into a beaker and add about 10 cm3 of distilled water, stir the mixture and filter. Test the filtrate with litmus papers. Keep the residue and the filtrate. [6 marks]
(b) (i) To about 2 cm3 of the filtrate, add few drops of aqueous HNO3 followed by AgNO3(aq).
(ii) Add excess NH3 solution to the resulting mixture. [5 marks]
(c) To about half of the residue from 2(a) above, add about 5 cm3 of dilute HNO3 in drops. Divide the resulting solution into two equal portions. [4 marks]
(d) (i) To the first portion add ammonia solution in drops and then in excess.
(ii) To the second portion add dilute hydrochloric acid. [6 marks]
