Chemistry Paper 3 WASSCE (PRIVATE CANDIDATE), 2019

Question 2

2. E is a mixture of two inorganic salts. The following tests were carried out on E.


Complete the following table.



[2 marks]


Observation

Majority of the candidates responded to this question. However, their performance was below average.


In part (a), Majority of the candidates were able to identify Cu2+, CO2 from CO32- based on the tests and the corresponding observations.


In part (b), majority of the candidates were not familiar with confirmatory test for SO42-.


Also, they were not familiar with the confirmatory test for Zn2+which differentiated it from Al2+


The expected answers include: