Combined ScienceCode 5129
Identification of ions
What this topic asks you to be able to do
- Do tests, and use the information given about how aqueous anions react, to identify: (a) carbonate, CO32–, by adding dilute acid and checking whether carbon dioxide gas is given off (b) chloride, Cl–, bromide, Br–, and iodide, I–, by making the solution acidic with dilute nitric acid and then adding aqueous silver nitrate to it (c) sulfate, SO42–, by adding dilute nitric acid and aqueous barium nitrate
- Do tests and draw on supplied information about how aqueous cations respond to aqueous sodium hydroxide and aqueous ammonia, so that you can identify: (a) aluminium, Al3+ (b) ammonium, NH4+ (c) calcium, Ca2+ (d) chromium(III), Cr3+ (e) copper(II), Cu2+ (f) iron(II), Fe2+ (g) iron(III), Fe3+ (h) zinc, Zn2+