A laboratory worker checks a white crystalline solid, R, from a manufacturing batch. Separate portions of R are tested.
The results are shown in the table.
| Test | Result |
|---|---|
| Flame test on solid R | Orange-red flame |
| Dissolve R in water, add dilute nitric acid, then add silver nitrate solution | Cream precipitate |
Give the name and formula of solid R.
107 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.