Question 1(a)(i)
1 mark
A student carried out some tests on four aqueous solutions, labelled A, B, C and D. Each solution contained one cation and one anion. Complete the table.
Test: Dilute aqueous ammonia was added drop-by-drop to 4 cm3 of A until there was no further change.
Observation: A pale blue precipitate formed which dissolved to give a deep blue solution.
Deduce the cation in A.
Test: Dilute aqueous ammonia was added drop-by-drop to 4 cm3 of A until there was no further change.
Observation: A pale blue precipitate formed which dissolved to give a deep blue solution.
Deduce the cation in A.