Credit will be given for strict adherence to instructions, for observations precisely recorded, and for accurate inferences. All tests, observations, and inferences must be clearly entered in your answer book, in ink, at the time they are made.

C and D are samples of two simple salts. Carry out the following exercises on them. Record your observations and state the conclusion you draw from the result of each test.

(a)(i) Put half of C in a test tube and add about 5cm\(^3\) of distilled water. Test with litmus.

(ii) Put the rest of C in a test tube and add about 5cm\(^3\)  of dilute hydrochloric acid. Identify any gases evolved.

 

(b)(i) Put half of D in a test tube. Add about 5cm\(^3\)  of sodium hydroxide solution and warm. Identify any gases evolved.

(ii) Put the rest of D in a test tube and add about 5cm\(^3\)  of distilled water. Mix thoroughly. Add about 2cm\(^3\) of barium chloride solution, followed by dilute hydrochloric acid in excess.