A student carries out a series of tests on a solid substance, X, and on an aqueous solution of X.
The tests and results are shown in the table below.
| Test | Result |
|---|---|
| Appearance of X | Pale-yellow solid |
| Electrical conductivity of solid X | Does not conduct electricity |
| Electrical conductivity of a solution of X | Conducts electricity |
| Add sodium hydroxide solution to a solution of X | A brown precipitate, Y, is formed |
| Add dilute hydrochloric acid, followed by barium chloride solution, to a solution of X | A white precipitate, Z, is formed |
Use the details in the table to deduce information about the bonding in X, and the chemical identities of X, Y, and Z. Explain each of your deductions.
Practise Edexcel GCSE Chemistry Qualitative analysis: tests for ions with exam-style questions for Foundation and Higher tier. 127 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
