(e)[2]
The green precipitate formed in test (c) becomes brown at the surface after a few minutes. Suggest why.
Chemistry 5070 · O Level · Identification of ions and gases
Identification of ions and gases — practice question
The table outlines the tests carried out by a student on compound $L$. $L$ contains three different ions. Fill in the table by giving the conclusion for (a), the observations for (b)(i), (ii) and (iii), the conclusions for (c)(i) and (ii), and both the test and the observation that support the conclusion for test (d). Any gases given off should be identified by test, result and name.